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 * pwd_group - The D-H group assigned for EAP-pwd
227 * If EAP-pwd is not used it can be set to zero.
232 * wps - Wi-Fi Protected Setup context
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.
238 struct wps_context *wps;
241 * ipv6 - Whether to enable IPv6 support in the RADIUS server
246 * start_time - Timestamp of server start
248 struct os_time start_time;
251 * counters - Statistics counters for server operations
253 * These counters are the sum over all clients.
255 struct radius_server_counters counters;
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
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.
271 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
272 int phase2, struct eap_user *user);
275 * eap_req_id_text - Optional data for EAP-Request/Identity
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
284 char *eap_req_id_text;
287 * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
289 size_t eap_req_id_text_len;
292 * msg_ctx - Context data for wpa_msg() calls
298 extern int wpa_debug_level;
300 #define RADIUS_DEBUG(args...) \
301 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
302 #define RADIUS_ERROR(args...) \
303 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
304 #define RADIUS_DUMP(args...) \
305 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
306 #define RADIUS_DUMP_ASCII(args...) \
307 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
310 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
311 static void radius_server_session_remove_timeout(void *eloop_ctx,
315 static struct radius_client *
316 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
319 struct radius_client *client = data->clients;
324 struct in6_addr *addr6;
327 addr6 = (struct in6_addr *) addr;
328 for (i = 0; i < 16; i++) {
329 if ((addr6->s6_addr[i] &
330 client->mask6.s6_addr[i]) !=
331 (client->addr6.s6_addr[i] &
332 client->mask6.s6_addr[i])) {
341 #endif /* CONFIG_IPV6 */
342 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
343 (addr->s_addr & client->mask.s_addr)) {
347 client = client->next;
354 static struct radius_session *
355 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
357 struct radius_session *sess = client->sessions;
360 if (sess->sess_id == sess_id) {
370 static void radius_server_session_free(struct radius_server_data *data,
371 struct radius_session *sess)
373 eloop_cancel_timeout(radius_server_session_timeout, data, sess);
374 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
375 eap_server_sm_deinit(sess->eap);
376 radius_msg_free(sess->last_msg);
377 os_free(sess->last_from_addr);
378 radius_msg_free(sess->last_reply);
384 static void radius_server_session_remove(struct radius_server_data *data,
385 struct radius_session *sess)
387 struct radius_client *client = sess->client;
388 struct radius_session *session, *prev;
390 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
393 session = client->sessions;
395 if (session == sess) {
397 client->sessions = sess->next;
399 prev->next = sess->next;
401 radius_server_session_free(data, sess);
405 session = session->next;
410 static void radius_server_session_remove_timeout(void *eloop_ctx,
413 struct radius_server_data *data = eloop_ctx;
414 struct radius_session *sess = timeout_ctx;
415 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
416 radius_server_session_remove(data, sess);
420 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
422 struct radius_server_data *data = eloop_ctx;
423 struct radius_session *sess = timeout_ctx;
425 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
426 radius_server_session_remove(data, sess);
430 static struct radius_session *
431 radius_server_new_session(struct radius_server_data *data,
432 struct radius_client *client)
434 struct radius_session *sess;
436 if (data->num_sess >= RADIUS_MAX_SESSION) {
437 RADIUS_DEBUG("Maximum number of existing session - no room "
438 "for a new session");
442 sess = os_zalloc(sizeof(*sess));
447 sess->client = client;
448 sess->sess_id = data->next_sess_id++;
449 sess->next = client->sessions;
450 client->sessions = sess;
451 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
452 radius_server_session_timeout, data, sess);
458 static struct radius_session *
459 radius_server_get_new_session(struct radius_server_data *data,
460 struct radius_client *client,
461 struct radius_msg *msg)
466 struct radius_session *sess;
467 struct eap_config eap_conf;
469 RADIUS_DEBUG("Creating a new session");
471 user = os_malloc(256);
475 res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
476 if (res < 0 || res > 256) {
477 RADIUS_DEBUG("Could not get User-Name");
482 RADIUS_DUMP_ASCII("User-Name", user, user_len);
484 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
488 RADIUS_DEBUG("Matching user entry found");
489 sess = radius_server_new_session(data, client);
491 RADIUS_DEBUG("Failed to create a new session");
495 RADIUS_DEBUG("User-Name not found from user database");
499 os_memset(&eap_conf, 0, sizeof(eap_conf));
500 eap_conf.ssl_ctx = data->ssl_ctx;
501 eap_conf.msg_ctx = data->msg_ctx;
502 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
503 eap_conf.backend_auth = TRUE;
504 eap_conf.eap_server = 1;
505 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
506 eap_conf.eap_fast_a_id = data->eap_fast_a_id;
507 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
508 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
509 eap_conf.eap_fast_prov = data->eap_fast_prov;
510 eap_conf.pac_key_lifetime = data->pac_key_lifetime;
511 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
512 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
513 eap_conf.tnc = data->tnc;
514 eap_conf.wps = data->wps;
515 eap_conf.pwd_group = data->pwd_group;
516 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
518 if (sess->eap == NULL) {
519 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
521 radius_server_session_free(data, sess);
524 sess->eap_if = eap_get_interface(sess->eap);
525 sess->eap_if->eapRestart = TRUE;
526 sess->eap_if->portEnabled = TRUE;
528 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
534 static struct radius_msg *
535 radius_server_encapsulate_eap(struct radius_server_data *data,
536 struct radius_client *client,
537 struct radius_session *sess,
538 struct radius_msg *request)
540 struct radius_msg *msg;
542 unsigned int sess_id;
543 struct radius_hdr *hdr = radius_msg_get_hdr(request);
545 if (sess->eap_if->eapFail) {
546 sess->eap_if->eapFail = FALSE;
547 code = RADIUS_CODE_ACCESS_REJECT;
548 } else if (sess->eap_if->eapSuccess) {
549 sess->eap_if->eapSuccess = FALSE;
550 code = RADIUS_CODE_ACCESS_ACCEPT;
552 sess->eap_if->eapReq = FALSE;
553 code = RADIUS_CODE_ACCESS_CHALLENGE;
556 msg = radius_msg_new(code, hdr->identifier);
558 RADIUS_DEBUG("Failed to allocate reply message");
562 sess_id = htonl(sess->sess_id);
563 if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
564 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
565 (u8 *) &sess_id, sizeof(sess_id))) {
566 RADIUS_DEBUG("Failed to add State attribute");
569 if (sess->eap_if->eapReqData &&
570 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
571 wpabuf_len(sess->eap_if->eapReqData))) {
572 RADIUS_DEBUG("Failed to add EAP-Message attribute");
575 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
577 if (sess->eap_if->eapKeyDataLen > 64) {
580 len = sess->eap_if->eapKeyDataLen / 2;
582 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
583 (u8 *) client->shared_secret,
584 client->shared_secret_len,
585 sess->eap_if->eapKeyData + len,
586 len, sess->eap_if->eapKeyData,
588 RADIUS_DEBUG("Failed to add MPPE key attributes");
592 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
593 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
594 radius_msg_free(msg);
598 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
599 client->shared_secret_len,
600 hdr->authenticator) < 0) {
601 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
608 static int radius_server_reject(struct radius_server_data *data,
609 struct radius_client *client,
610 struct radius_msg *request,
611 struct sockaddr *from, socklen_t fromlen,
612 const char *from_addr, int from_port)
614 struct radius_msg *msg;
616 struct eap_hdr eapfail;
618 struct radius_hdr *hdr = radius_msg_get_hdr(request);
620 RADIUS_DEBUG("Reject invalid request from %s:%d",
621 from_addr, from_port);
623 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
628 os_memset(&eapfail, 0, sizeof(eapfail));
629 eapfail.code = EAP_CODE_FAILURE;
630 eapfail.identifier = 0;
631 eapfail.length = host_to_be16(sizeof(eapfail));
633 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
634 RADIUS_DEBUG("Failed to add EAP-Message attribute");
637 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
638 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
639 radius_msg_free(msg);
643 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
644 client->shared_secret_len,
645 hdr->authenticator) <
647 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
650 if (wpa_debug_level <= MSG_MSGDUMP) {
651 radius_msg_dump(msg);
654 data->counters.access_rejects++;
655 client->counters.access_rejects++;
656 buf = radius_msg_get_buf(msg);
657 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
658 (struct sockaddr *) from, sizeof(*from)) < 0) {
659 perror("sendto[RADIUS SRV]");
663 radius_msg_free(msg);
669 static int radius_server_request(struct radius_server_data *data,
670 struct radius_msg *msg,
671 struct sockaddr *from, socklen_t fromlen,
672 struct radius_client *client,
673 const char *from_addr, int from_port,
674 struct radius_session *force_sess)
678 int res, state_included = 0;
681 struct radius_session *sess;
682 struct radius_msg *reply;
688 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
690 state_included = res >= 0;
691 if (res == sizeof(statebuf)) {
692 state = WPA_GET_BE32(statebuf);
693 sess = radius_server_get_session(client, state);
700 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
701 } else if (state_included) {
702 RADIUS_DEBUG("State attribute included but no session found");
703 radius_server_reject(data, client, msg, from, fromlen,
704 from_addr, from_port);
707 sess = radius_server_get_new_session(data, client, msg);
709 RADIUS_DEBUG("Could not create a new session");
710 radius_server_reject(data, client, msg, from, fromlen,
711 from_addr, from_port);
716 if (sess->last_from_port == from_port &&
717 sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
718 os_memcmp(sess->last_authenticator,
719 radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
720 RADIUS_DEBUG("Duplicate message from %s", from_addr);
721 data->counters.dup_access_requests++;
722 client->counters.dup_access_requests++;
724 if (sess->last_reply) {
726 buf = radius_msg_get_buf(sess->last_reply);
727 res = sendto(data->auth_sock, wpabuf_head(buf),
729 (struct sockaddr *) from, fromlen);
731 perror("sendto[RADIUS SRV]");
736 RADIUS_DEBUG("No previous reply available for duplicate "
741 eap = radius_msg_get_eap(msg, &eap_len);
743 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
745 data->counters.packets_dropped++;
746 client->counters.packets_dropped++;
750 RADIUS_DUMP("Received EAP data", eap, eap_len);
752 /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
753 * RFC3579 Sect. 2.6.2.
754 * Include EAP-Response/Nak with no preferred method if
756 * If code is not 1-4, discard the packet silently.
757 * Or is this already done by the EAP state machine? */
759 wpabuf_free(sess->eap_if->eapRespData);
760 sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
761 if (sess->eap_if->eapRespData == NULL)
764 sess->eap_if->eapResp = TRUE;
765 eap_server_sm_step(sess->eap);
767 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
768 sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
769 RADIUS_DUMP("EAP data from the state machine",
770 wpabuf_head(sess->eap_if->eapReqData),
771 wpabuf_len(sess->eap_if->eapReqData));
772 } else if (sess->eap_if->eapFail) {
773 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
775 } else if (eap_sm_method_pending(sess->eap)) {
776 radius_msg_free(sess->last_msg);
777 sess->last_msg = msg;
778 sess->last_from_port = from_port;
779 os_free(sess->last_from_addr);
780 sess->last_from_addr = os_strdup(from_addr);
781 sess->last_fromlen = fromlen;
782 os_memcpy(&sess->last_from, from, fromlen);
785 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
786 " Access-Request silently (assuming it was a "
788 data->counters.packets_dropped++;
789 client->counters.packets_dropped++;
793 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
796 reply = radius_server_encapsulate_eap(data, client, sess, msg);
800 struct radius_hdr *hdr;
802 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
803 if (wpa_debug_level <= MSG_MSGDUMP) {
804 radius_msg_dump(reply);
807 switch (radius_msg_get_hdr(reply)->code) {
808 case RADIUS_CODE_ACCESS_ACCEPT:
809 data->counters.access_accepts++;
810 client->counters.access_accepts++;
812 case RADIUS_CODE_ACCESS_REJECT:
813 data->counters.access_rejects++;
814 client->counters.access_rejects++;
816 case RADIUS_CODE_ACCESS_CHALLENGE:
817 data->counters.access_challenges++;
818 client->counters.access_challenges++;
821 buf = radius_msg_get_buf(reply);
822 res = sendto(data->auth_sock, wpabuf_head(buf),
824 (struct sockaddr *) from, fromlen);
826 perror("sendto[RADIUS SRV]");
828 radius_msg_free(sess->last_reply);
829 sess->last_reply = reply;
830 sess->last_from_port = from_port;
831 hdr = radius_msg_get_hdr(msg);
832 sess->last_identifier = hdr->identifier;
833 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
835 data->counters.packets_dropped++;
836 client->counters.packets_dropped++;
840 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
842 eloop_cancel_timeout(radius_server_session_remove_timeout,
844 eloop_register_timeout(10, 0,
845 radius_server_session_remove_timeout,
853 static void radius_server_receive_auth(int sock, void *eloop_ctx,
856 struct radius_server_data *data = eloop_ctx;
859 struct sockaddr_storage ss;
860 struct sockaddr_in sin;
862 struct sockaddr_in6 sin6;
863 #endif /* CONFIG_IPV6 */
867 struct radius_client *client = NULL;
868 struct radius_msg *msg = NULL;
872 buf = os_malloc(RADIUS_MAX_MSG_LEN);
877 fromlen = sizeof(from);
878 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
879 (struct sockaddr *) &from.ss, &fromlen);
881 perror("recvfrom[radius_server]");
887 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
888 sizeof(abuf)) == NULL)
890 from_port = ntohs(from.sin6.sin6_port);
891 RADIUS_DEBUG("Received %d bytes from %s:%d",
892 len, abuf, from_port);
894 client = radius_server_get_client(data,
896 &from.sin6.sin6_addr, 1);
898 #endif /* CONFIG_IPV6 */
901 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
902 from_port = ntohs(from.sin.sin_port);
903 RADIUS_DEBUG("Received %d bytes from %s:%d",
904 len, abuf, from_port);
906 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
909 RADIUS_DUMP("Received data", buf, len);
911 if (client == NULL) {
912 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
913 data->counters.invalid_requests++;
917 msg = radius_msg_parse(buf, len);
919 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
920 data->counters.malformed_access_requests++;
921 client->counters.malformed_access_requests++;
928 if (wpa_debug_level <= MSG_MSGDUMP) {
929 radius_msg_dump(msg);
932 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
933 RADIUS_DEBUG("Unexpected RADIUS code %d",
934 radius_msg_get_hdr(msg)->code);
935 data->counters.unknown_types++;
936 client->counters.unknown_types++;
940 data->counters.access_requests++;
941 client->counters.access_requests++;
943 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
944 client->shared_secret_len, NULL)) {
945 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
946 data->counters.bad_authenticators++;
947 client->counters.bad_authenticators++;
951 if (radius_server_request(data, msg, (struct sockaddr *) &from,
952 fromlen, client, abuf, from_port, NULL) ==
954 return; /* msg was stored with the session */
957 radius_msg_free(msg);
962 static int radius_server_disable_pmtu_discovery(int s)
965 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
966 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
967 int action = IP_PMTUDISC_DONT;
968 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
971 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
972 "%s", strerror(errno));
978 static int radius_server_open_socket(int port)
981 struct sockaddr_in addr;
983 s = socket(PF_INET, SOCK_DGRAM, 0);
989 radius_server_disable_pmtu_discovery(s);
991 os_memset(&addr, 0, sizeof(addr));
992 addr.sin_family = AF_INET;
993 addr.sin_port = htons(port);
994 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1005 static int radius_server_open_socket6(int port)
1008 struct sockaddr_in6 addr;
1010 s = socket(PF_INET6, SOCK_DGRAM, 0);
1012 perror("socket[IPv6]");
1016 os_memset(&addr, 0, sizeof(addr));
1017 addr.sin6_family = AF_INET6;
1018 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
1019 addr.sin6_port = htons(port);
1020 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1028 #endif /* CONFIG_IPV6 */
1031 static void radius_server_free_sessions(struct radius_server_data *data,
1032 struct radius_session *sessions)
1034 struct radius_session *session, *prev;
1039 session = session->next;
1040 radius_server_session_free(data, prev);
1045 static void radius_server_free_clients(struct radius_server_data *data,
1046 struct radius_client *clients)
1048 struct radius_client *client, *prev;
1053 client = client->next;
1055 radius_server_free_sessions(data, prev->sessions);
1056 os_free(prev->shared_secret);
1062 static struct radius_client *
1063 radius_server_read_clients(const char *client_file, int ipv6)
1066 const int buf_size = 1024;
1068 struct radius_client *clients, *tail, *entry;
1069 int line = 0, mask, failed = 0, i;
1070 struct in_addr addr;
1072 struct in6_addr addr6;
1073 #endif /* CONFIG_IPV6 */
1076 f = fopen(client_file, "r");
1078 RADIUS_ERROR("Could not open client file '%s'", client_file);
1082 buf = os_malloc(buf_size);
1088 clients = tail = NULL;
1089 while (fgets(buf, buf_size, f)) {
1090 /* Configuration file format:
1091 * 192.168.1.0/24 secret
1092 * 192.168.1.2 secret
1093 * fe80::211:22ff:fe33:4455/64 secretipv6
1096 buf[buf_size - 1] = '\0';
1098 while (*pos != '\0' && *pos != '\n')
1102 if (*buf == '\0' || *buf == '#')
1106 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
1107 (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
1108 (*pos >= 'A' && *pos <= 'F')) {
1120 mask = strtol(pos, &end, 10);
1122 (mask < 0 || mask > (ipv6 ? 128 : 32))) {
1128 mask = ipv6 ? 128 : 32;
1132 if (!ipv6 && inet_aton(buf, &addr) == 0) {
1137 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
1138 if (inet_pton(AF_INET, buf, &addr) <= 0) {
1142 /* Convert IPv4 address to IPv6 */
1145 os_memset(addr6.s6_addr, 0, 10);
1146 addr6.s6_addr[10] = 0xff;
1147 addr6.s6_addr[11] = 0xff;
1148 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
1151 #endif /* CONFIG_IPV6 */
1153 while (*pos == ' ' || *pos == '\t') {
1162 entry = os_zalloc(sizeof(*entry));
1163 if (entry == NULL) {
1167 entry->shared_secret = os_strdup(pos);
1168 if (entry->shared_secret == NULL) {
1173 entry->shared_secret_len = os_strlen(entry->shared_secret);
1174 entry->addr.s_addr = addr.s_addr;
1177 for (i = 0; i < mask; i++)
1178 val |= 1 << (31 - i);
1179 entry->mask.s_addr = htonl(val);
1183 int offset = mask / 8;
1185 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
1186 os_memset(entry->mask6.s6_addr, 0xff, offset);
1188 for (i = 0; i < (mask % 8); i++)
1189 val |= 1 << (7 - i);
1191 entry->mask6.s6_addr[offset] = val;
1193 #endif /* CONFIG_IPV6 */
1196 clients = tail = entry;
1204 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1205 radius_server_free_clients(NULL, clients);
1217 * radius_server_init - Initialize RADIUS server
1218 * @conf: Configuration for the RADIUS server
1219 * Returns: Pointer to private RADIUS server context or %NULL on failure
1221 * This initializes a RADIUS server instance and returns a context pointer that
1222 * will be used in other calls to the RADIUS server module. The server can be
1223 * deinitialize by calling radius_server_deinit().
1225 struct radius_server_data *
1226 radius_server_init(struct radius_server_conf *conf)
1228 struct radius_server_data *data;
1232 fprintf(stderr, "RADIUS server compiled without IPv6 "
1236 #endif /* CONFIG_IPV6 */
1238 data = os_zalloc(sizeof(*data));
1242 os_get_time(&data->start_time);
1243 data->conf_ctx = conf->conf_ctx;
1244 data->eap_sim_db_priv = conf->eap_sim_db_priv;
1245 data->ssl_ctx = conf->ssl_ctx;
1246 data->msg_ctx = conf->msg_ctx;
1247 data->ipv6 = conf->ipv6;
1248 if (conf->pac_opaque_encr_key) {
1249 data->pac_opaque_encr_key = os_malloc(16);
1250 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1253 if (conf->eap_fast_a_id) {
1254 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1255 if (data->eap_fast_a_id) {
1256 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1257 conf->eap_fast_a_id_len);
1258 data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1261 if (conf->eap_fast_a_id_info)
1262 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
1263 data->eap_fast_prov = conf->eap_fast_prov;
1264 data->pac_key_lifetime = conf->pac_key_lifetime;
1265 data->pac_key_refresh_time = conf->pac_key_refresh_time;
1266 data->get_eap_user = conf->get_eap_user;
1267 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
1268 data->tnc = conf->tnc;
1269 data->wps = conf->wps;
1270 data->pwd_group = conf->pwd_group;
1271 if (conf->eap_req_id_text) {
1272 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1273 if (data->eap_req_id_text) {
1274 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1275 conf->eap_req_id_text_len);
1276 data->eap_req_id_text_len = conf->eap_req_id_text_len;
1280 data->clients = radius_server_read_clients(conf->client_file,
1282 if (data->clients == NULL) {
1283 printf("No RADIUS clients configured.\n");
1284 radius_server_deinit(data);
1290 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1292 #endif /* CONFIG_IPV6 */
1293 data->auth_sock = radius_server_open_socket(conf->auth_port);
1294 if (data->auth_sock < 0) {
1295 printf("Failed to open UDP socket for RADIUS authentication "
1297 radius_server_deinit(data);
1300 if (eloop_register_read_sock(data->auth_sock,
1301 radius_server_receive_auth,
1303 radius_server_deinit(data);
1312 * radius_server_deinit - Deinitialize RADIUS server
1313 * @data: RADIUS server context from radius_server_init()
1315 void radius_server_deinit(struct radius_server_data *data)
1320 if (data->auth_sock >= 0) {
1321 eloop_unregister_read_sock(data->auth_sock);
1322 close(data->auth_sock);
1325 radius_server_free_clients(data, data->clients);
1327 os_free(data->pac_opaque_encr_key);
1328 os_free(data->eap_fast_a_id);
1329 os_free(data->eap_fast_a_id_info);
1330 os_free(data->eap_req_id_text);
1336 * radius_server_get_mib - Get RADIUS server MIB information
1337 * @data: RADIUS server context from radius_server_init()
1338 * @buf: Buffer for returning the MIB data in text format
1339 * @buflen: buf length in octets
1340 * Returns: Number of octets written into buf
1342 int radius_server_get_mib(struct radius_server_data *data, char *buf,
1349 struct radius_client *cli;
1351 /* RFC 2619 - RADIUS Authentication Server MIB */
1353 if (data == NULL || buflen == 0)
1360 uptime = (now.sec - data->start_time.sec) * 100 +
1361 ((now.usec - data->start_time.usec) / 10000) % 100;
1362 ret = os_snprintf(pos, end - pos,
1363 "RADIUS-AUTH-SERVER-MIB\n"
1364 "radiusAuthServIdent=hostapd\n"
1365 "radiusAuthServUpTime=%d\n"
1366 "radiusAuthServResetTime=0\n"
1367 "radiusAuthServConfigReset=4\n",
1369 if (ret < 0 || ret >= end - pos) {
1375 ret = os_snprintf(pos, end - pos,
1376 "radiusAuthServTotalAccessRequests=%u\n"
1377 "radiusAuthServTotalInvalidRequests=%u\n"
1378 "radiusAuthServTotalDupAccessRequests=%u\n"
1379 "radiusAuthServTotalAccessAccepts=%u\n"
1380 "radiusAuthServTotalAccessRejects=%u\n"
1381 "radiusAuthServTotalAccessChallenges=%u\n"
1382 "radiusAuthServTotalMalformedAccessRequests=%u\n"
1383 "radiusAuthServTotalBadAuthenticators=%u\n"
1384 "radiusAuthServTotalPacketsDropped=%u\n"
1385 "radiusAuthServTotalUnknownTypes=%u\n",
1386 data->counters.access_requests,
1387 data->counters.invalid_requests,
1388 data->counters.dup_access_requests,
1389 data->counters.access_accepts,
1390 data->counters.access_rejects,
1391 data->counters.access_challenges,
1392 data->counters.malformed_access_requests,
1393 data->counters.bad_authenticators,
1394 data->counters.packets_dropped,
1395 data->counters.unknown_types);
1396 if (ret < 0 || ret >= end - pos) {
1402 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1403 char abuf[50], mbuf[50];
1406 if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1407 sizeof(abuf)) == NULL)
1409 if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1410 sizeof(mbuf)) == NULL)
1413 #endif /* CONFIG_IPV6 */
1415 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1416 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1419 ret = os_snprintf(pos, end - pos,
1420 "radiusAuthClientIndex=%u\n"
1421 "radiusAuthClientAddress=%s/%s\n"
1422 "radiusAuthServAccessRequests=%u\n"
1423 "radiusAuthServDupAccessRequests=%u\n"
1424 "radiusAuthServAccessAccepts=%u\n"
1425 "radiusAuthServAccessRejects=%u\n"
1426 "radiusAuthServAccessChallenges=%u\n"
1427 "radiusAuthServMalformedAccessRequests=%u\n"
1428 "radiusAuthServBadAuthenticators=%u\n"
1429 "radiusAuthServPacketsDropped=%u\n"
1430 "radiusAuthServUnknownTypes=%u\n",
1433 cli->counters.access_requests,
1434 cli->counters.dup_access_requests,
1435 cli->counters.access_accepts,
1436 cli->counters.access_rejects,
1437 cli->counters.access_challenges,
1438 cli->counters.malformed_access_requests,
1439 cli->counters.bad_authenticators,
1440 cli->counters.packets_dropped,
1441 cli->counters.unknown_types);
1442 if (ret < 0 || ret >= end - pos) {
1453 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1454 size_t identity_len, int phase2,
1455 struct eap_user *user)
1457 struct radius_session *sess = ctx;
1458 struct radius_server_data *data = sess->server;
1460 return data->get_eap_user(data->conf_ctx, identity, identity_len,
1465 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1467 struct radius_session *sess = ctx;
1468 struct radius_server_data *data = sess->server;
1469 *len = data->eap_req_id_text_len;
1470 return data->eap_req_id_text;
1474 static struct eapol_callbacks radius_server_eapol_cb =
1476 .get_eap_user = radius_server_get_eap_user,
1477 .get_eap_req_id_text = radius_server_get_eap_req_id_text,
1482 * radius_server_eap_pending_cb - Pending EAP data notification
1483 * @data: RADIUS server context from radius_server_init()
1484 * @ctx: Pending EAP context pointer
1486 * This function is used to notify EAP server module that a pending operation
1487 * has been completed and processing of the EAP session can proceed.
1489 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1491 struct radius_client *cli;
1492 struct radius_session *s, *sess = NULL;
1493 struct radius_msg *msg;
1498 for (cli = data->clients; cli; cli = cli->next) {
1499 for (s = cli->sessions; s; s = s->next) {
1500 if (s->eap == ctx && s->last_msg) {
1512 RADIUS_DEBUG("No session matched callback ctx");
1516 msg = sess->last_msg;
1517 sess->last_msg = NULL;
1518 eap_sm_pending_cb(sess->eap);
1519 if (radius_server_request(data, msg,
1520 (struct sockaddr *) &sess->last_from,
1521 sess->last_fromlen, cli,
1522 sess->last_from_addr,
1523 sess->last_from_port, sess) == -2)
1524 return; /* msg was stored with the session */
1526 radius_msg_free(msg);