2 * RADIUS authentication server
3 * Copyright (c) 2005-2009, 2011, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
15 #include "eap_server/eap.h"
16 #include "radius_server.h"
19 * RADIUS_SESSION_TIMEOUT - Session timeout in seconds
21 #define RADIUS_SESSION_TIMEOUT 60
24 * RADIUS_MAX_SESSION - Maximum number of active sessions
26 #define RADIUS_MAX_SESSION 100
29 * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
31 #define RADIUS_MAX_MSG_LEN 3000
33 static struct eapol_callbacks radius_server_eapol_cb;
36 struct radius_server_data;
39 * struct radius_server_counters - RADIUS server statistics counters
41 struct radius_server_counters {
44 u32 dup_access_requests;
47 u32 access_challenges;
48 u32 malformed_access_requests;
49 u32 bad_authenticators;
55 * struct radius_session - Internal RADIUS server data for a session
57 struct radius_session {
58 struct radius_session *next;
59 struct radius_client *client;
60 struct radius_server_data *server;
63 struct eap_eapol_interface *eap_if;
65 struct radius_msg *last_msg;
68 struct sockaddr_storage last_from;
69 socklen_t last_fromlen;
71 struct radius_msg *last_reply;
72 u8 last_authenticator[16];
76 * struct radius_client - Internal RADIUS server data for a client
78 struct radius_client {
79 struct radius_client *next;
83 struct in6_addr addr6;
84 struct in6_addr mask6;
85 #endif /* CONFIG_IPV6 */
87 int shared_secret_len;
88 struct radius_session *sessions;
89 struct radius_server_counters counters;
93 * struct radius_server_data - Internal RADIUS server data
95 struct radius_server_data {
97 * auth_sock - Socket for RADIUS authentication messages
102 * clients - List of authorized RADIUS clients
104 struct radius_client *clients;
107 * next_sess_id - Next session identifier
109 unsigned int next_sess_id;
112 * conf_ctx - Context pointer for callbacks
114 * This is used as the ctx argument in get_eap_user() calls.
119 * num_sess - Number of active sessions
124 * eap_sim_db_priv - EAP-SIM/AKA database context
126 * This is passed to the EAP-SIM/AKA server implementation as a
129 void *eap_sim_db_priv;
132 * ssl_ctx - TLS context
134 * This is passed to the EAP server implementation as a callback
135 * context for TLS operations.
140 * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST
142 * This parameter is used to set a key for EAP-FAST to encrypt the
143 * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If
144 * set, must point to a 16-octet key.
146 u8 *pac_opaque_encr_key;
149 * eap_fast_a_id - EAP-FAST authority identity (A-ID)
151 * If EAP-FAST is not used, this can be set to %NULL. In theory, this
152 * is a variable length field, but due to some existing implementations
153 * requiring A-ID to be 16 octets in length, it is recommended to use
154 * that length for the field to provide interoperability with deployed
155 * peer implementations.
160 * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets
162 size_t eap_fast_a_id_len;
165 * eap_fast_a_id_info - EAP-FAST authority identifier information
167 * This A-ID-Info contains a user-friendly name for the A-ID. For
168 * example, this could be the enterprise and server names in
169 * human-readable format. This field is encoded as UTF-8. If EAP-FAST
170 * is not used, this can be set to %NULL.
172 char *eap_fast_a_id_info;
175 * eap_fast_prov - EAP-FAST provisioning modes
177 * 0 = provisioning disabled, 1 = only anonymous provisioning allowed,
178 * 2 = only authenticated provisioning allowed, 3 = both provisioning
184 * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds
186 * This is the hard limit on how long a provisioned PAC-Key can be
189 int pac_key_lifetime;
192 * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds
194 * This is a soft limit on the PAC-Key. The server will automatically
195 * generate a new PAC-Key when this number of seconds (or fewer) of the
198 int pac_key_refresh_time;
201 * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication
203 * This controls whether the protected success/failure indication
204 * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA.
206 int eap_sim_aka_result_ind;
209 * tnc - Trusted Network Connect (TNC)
211 * This controls whether TNC is enabled and will be required before the
212 * peer is allowed to connect. Note: This is only used with EAP-TTLS
213 * and EAP-FAST. If any other EAP method is enabled, the peer will be
214 * allowed to connect without TNC.
219 * pwd_group - The D-H group assigned for EAP-pwd
221 * If EAP-pwd is not used it can be set to zero.
226 * server_id - Server identity
228 const char *server_id;
231 * wps - Wi-Fi Protected Setup context
233 * If WPS is used with an external RADIUS server (which is quite
234 * unlikely configuration), this is used to provide a pointer to WPS
235 * context data. Normally, this can be set to %NULL.
237 struct wps_context *wps;
240 * ipv6 - Whether to enable IPv6 support in the RADIUS server
245 * start_time - Timestamp of server start
247 struct os_reltime start_time;
250 * counters - Statistics counters for server operations
252 * These counters are the sum over all clients.
254 struct radius_server_counters counters;
257 * get_eap_user - Callback for fetching EAP user information
258 * @ctx: Context data from conf_ctx
259 * @identity: User identity
260 * @identity_len: identity buffer length in octets
261 * @phase2: Whether this is for Phase 2 identity
262 * @user: Data structure for filling in the user information
263 * Returns: 0 on success, -1 on failure
265 * This is used to fetch information from user database. The callback
266 * will fill in information about allowed EAP methods and the user
267 * password. The password field will be an allocated copy of the
268 * password data and RADIUS server will free it after use.
270 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
271 int phase2, struct eap_user *user);
274 * eap_req_id_text - Optional data for EAP-Request/Identity
276 * This can be used to configure an optional, displayable message that
277 * will be sent in EAP-Request/Identity. This string can contain an
278 * ASCII-0 character (nul) to separate network infromation per RFC
279 * 4284. The actual string length is explicit provided in
280 * eap_req_id_text_len since nul character will not be used as a string
283 char *eap_req_id_text;
286 * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
288 size_t eap_req_id_text_len;
291 * msg_ctx - Context data for wpa_msg() calls
295 #ifdef CONFIG_RADIUS_TEST
297 #endif /* CONFIG_RADIUS_TEST */
301 #define RADIUS_DEBUG(args...) \
302 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
303 #define RADIUS_ERROR(args...) \
304 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
305 #define RADIUS_DUMP(args...) \
306 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
307 #define RADIUS_DUMP_ASCII(args...) \
308 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
311 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
312 static void radius_server_session_remove_timeout(void *eloop_ctx,
316 static struct radius_client *
317 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
320 struct radius_client *client = data->clients;
325 struct in6_addr *addr6;
328 addr6 = (struct in6_addr *) addr;
329 for (i = 0; i < 16; i++) {
330 if ((addr6->s6_addr[i] &
331 client->mask6.s6_addr[i]) !=
332 (client->addr6.s6_addr[i] &
333 client->mask6.s6_addr[i])) {
342 #endif /* CONFIG_IPV6 */
343 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
344 (addr->s_addr & client->mask.s_addr)) {
348 client = client->next;
355 static struct radius_session *
356 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
358 struct radius_session *sess = client->sessions;
361 if (sess->sess_id == sess_id) {
371 static void radius_server_session_free(struct radius_server_data *data,
372 struct radius_session *sess)
374 eloop_cancel_timeout(radius_server_session_timeout, data, sess);
375 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
376 eap_server_sm_deinit(sess->eap);
377 radius_msg_free(sess->last_msg);
378 os_free(sess->last_from_addr);
379 radius_msg_free(sess->last_reply);
385 static void radius_server_session_remove(struct radius_server_data *data,
386 struct radius_session *sess)
388 struct radius_client *client = sess->client;
389 struct radius_session *session, *prev;
391 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
394 session = client->sessions;
396 if (session == sess) {
398 client->sessions = sess->next;
400 prev->next = sess->next;
402 radius_server_session_free(data, sess);
406 session = session->next;
411 static void radius_server_session_remove_timeout(void *eloop_ctx,
414 struct radius_server_data *data = eloop_ctx;
415 struct radius_session *sess = timeout_ctx;
416 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
417 radius_server_session_remove(data, sess);
421 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
423 struct radius_server_data *data = eloop_ctx;
424 struct radius_session *sess = timeout_ctx;
426 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
427 radius_server_session_remove(data, sess);
431 static struct radius_session *
432 radius_server_new_session(struct radius_server_data *data,
433 struct radius_client *client)
435 struct radius_session *sess;
437 if (data->num_sess >= RADIUS_MAX_SESSION) {
438 RADIUS_DEBUG("Maximum number of existing session - no room "
439 "for a new session");
443 sess = os_zalloc(sizeof(*sess));
448 sess->client = client;
449 sess->sess_id = data->next_sess_id++;
450 sess->next = client->sessions;
451 client->sessions = sess;
452 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
453 radius_server_session_timeout, data, sess);
459 static struct radius_session *
460 radius_server_get_new_session(struct radius_server_data *data,
461 struct radius_client *client,
462 struct radius_msg *msg)
467 struct radius_session *sess;
468 struct eap_config eap_conf;
470 RADIUS_DEBUG("Creating a new session");
472 user = os_malloc(256);
476 res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
477 if (res < 0 || res > 256) {
478 RADIUS_DEBUG("Could not get User-Name");
483 RADIUS_DUMP_ASCII("User-Name", user, user_len);
485 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
489 RADIUS_DEBUG("Matching user entry found");
490 sess = radius_server_new_session(data, client);
492 RADIUS_DEBUG("Failed to create a new session");
496 RADIUS_DEBUG("User-Name not found from user database");
500 os_memset(&eap_conf, 0, sizeof(eap_conf));
501 eap_conf.ssl_ctx = data->ssl_ctx;
502 eap_conf.msg_ctx = data->msg_ctx;
503 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
504 eap_conf.backend_auth = TRUE;
505 eap_conf.eap_server = 1;
506 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
507 eap_conf.eap_fast_a_id = data->eap_fast_a_id;
508 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
509 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
510 eap_conf.eap_fast_prov = data->eap_fast_prov;
511 eap_conf.pac_key_lifetime = data->pac_key_lifetime;
512 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
513 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
514 eap_conf.tnc = data->tnc;
515 eap_conf.wps = data->wps;
516 eap_conf.pwd_group = data->pwd_group;
517 eap_conf.server_id = (const u8 *) data->server_id;
518 eap_conf.server_id_len = os_strlen(data->server_id);
519 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
521 if (sess->eap == NULL) {
522 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
524 radius_server_session_free(data, sess);
527 sess->eap_if = eap_get_interface(sess->eap);
528 sess->eap_if->eapRestart = TRUE;
529 sess->eap_if->portEnabled = TRUE;
531 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
537 static struct radius_msg *
538 radius_server_encapsulate_eap(struct radius_server_data *data,
539 struct radius_client *client,
540 struct radius_session *sess,
541 struct radius_msg *request)
543 struct radius_msg *msg;
545 unsigned int sess_id;
546 struct radius_hdr *hdr = radius_msg_get_hdr(request);
548 if (sess->eap_if->eapFail) {
549 sess->eap_if->eapFail = FALSE;
550 code = RADIUS_CODE_ACCESS_REJECT;
551 } else if (sess->eap_if->eapSuccess) {
552 sess->eap_if->eapSuccess = FALSE;
553 code = RADIUS_CODE_ACCESS_ACCEPT;
555 sess->eap_if->eapReq = FALSE;
556 code = RADIUS_CODE_ACCESS_CHALLENGE;
559 msg = radius_msg_new(code, hdr->identifier);
561 RADIUS_DEBUG("Failed to allocate reply message");
565 sess_id = htonl(sess->sess_id);
566 if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
567 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
568 (u8 *) &sess_id, sizeof(sess_id))) {
569 RADIUS_DEBUG("Failed to add State attribute");
572 if (sess->eap_if->eapReqData &&
573 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
574 wpabuf_len(sess->eap_if->eapReqData))) {
575 RADIUS_DEBUG("Failed to add EAP-Message attribute");
578 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
580 #ifdef CONFIG_RADIUS_TEST
581 if (data->dump_msk_file) {
583 char buf[2 * 64 + 1];
584 f = fopen(data->dump_msk_file, "a");
586 len = sess->eap_if->eapKeyDataLen;
589 len = wpa_snprintf_hex(
591 sess->eap_if->eapKeyData, len);
593 fprintf(f, "%s\n", buf);
597 #endif /* CONFIG_RADIUS_TEST */
598 if (sess->eap_if->eapKeyDataLen > 64) {
601 len = sess->eap_if->eapKeyDataLen / 2;
603 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
604 (u8 *) client->shared_secret,
605 client->shared_secret_len,
606 sess->eap_if->eapKeyData + len,
607 len, sess->eap_if->eapKeyData,
609 RADIUS_DEBUG("Failed to add MPPE key attributes");
613 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
614 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
615 radius_msg_free(msg);
619 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
620 client->shared_secret_len,
621 hdr->authenticator) < 0) {
622 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
629 static int radius_server_reject(struct radius_server_data *data,
630 struct radius_client *client,
631 struct radius_msg *request,
632 struct sockaddr *from, socklen_t fromlen,
633 const char *from_addr, int from_port)
635 struct radius_msg *msg;
637 struct eap_hdr eapfail;
639 struct radius_hdr *hdr = radius_msg_get_hdr(request);
641 RADIUS_DEBUG("Reject invalid request from %s:%d",
642 from_addr, from_port);
644 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
649 os_memset(&eapfail, 0, sizeof(eapfail));
650 eapfail.code = EAP_CODE_FAILURE;
651 eapfail.identifier = 0;
652 eapfail.length = host_to_be16(sizeof(eapfail));
654 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
655 RADIUS_DEBUG("Failed to add EAP-Message attribute");
658 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
659 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
660 radius_msg_free(msg);
664 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
665 client->shared_secret_len,
666 hdr->authenticator) <
668 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
671 if (wpa_debug_level <= MSG_MSGDUMP) {
672 radius_msg_dump(msg);
675 data->counters.access_rejects++;
676 client->counters.access_rejects++;
677 buf = radius_msg_get_buf(msg);
678 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
679 (struct sockaddr *) from, sizeof(*from)) < 0) {
680 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno));
684 radius_msg_free(msg);
690 static int radius_server_request(struct radius_server_data *data,
691 struct radius_msg *msg,
692 struct sockaddr *from, socklen_t fromlen,
693 struct radius_client *client,
694 const char *from_addr, int from_port,
695 struct radius_session *force_sess)
697 struct wpabuf *eap = NULL;
698 int res, state_included = 0;
701 struct radius_session *sess;
702 struct radius_msg *reply;
708 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
710 state_included = res >= 0;
711 if (res == sizeof(statebuf)) {
712 state = WPA_GET_BE32(statebuf);
713 sess = radius_server_get_session(client, state);
720 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
721 } else if (state_included) {
722 RADIUS_DEBUG("State attribute included but no session found");
723 radius_server_reject(data, client, msg, from, fromlen,
724 from_addr, from_port);
727 sess = radius_server_get_new_session(data, client, msg);
729 RADIUS_DEBUG("Could not create a new session");
730 radius_server_reject(data, client, msg, from, fromlen,
731 from_addr, from_port);
736 if (sess->last_from_port == from_port &&
737 sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
738 os_memcmp(sess->last_authenticator,
739 radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
740 RADIUS_DEBUG("Duplicate message from %s", from_addr);
741 data->counters.dup_access_requests++;
742 client->counters.dup_access_requests++;
744 if (sess->last_reply) {
746 buf = radius_msg_get_buf(sess->last_reply);
747 res = sendto(data->auth_sock, wpabuf_head(buf),
749 (struct sockaddr *) from, fromlen);
751 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
757 RADIUS_DEBUG("No previous reply available for duplicate "
762 eap = radius_msg_get_eap(msg);
764 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
766 data->counters.packets_dropped++;
767 client->counters.packets_dropped++;
771 RADIUS_DUMP("Received EAP data", wpabuf_head(eap), wpabuf_len(eap));
773 /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
774 * RFC3579 Sect. 2.6.2.
775 * Include EAP-Response/Nak with no preferred method if
777 * If code is not 1-4, discard the packet silently.
778 * Or is this already done by the EAP state machine? */
780 wpabuf_free(sess->eap_if->eapRespData);
781 sess->eap_if->eapRespData = eap;
782 sess->eap_if->eapResp = TRUE;
783 eap_server_sm_step(sess->eap);
785 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
786 sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
787 RADIUS_DUMP("EAP data from the state machine",
788 wpabuf_head(sess->eap_if->eapReqData),
789 wpabuf_len(sess->eap_if->eapReqData));
790 } else if (sess->eap_if->eapFail) {
791 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
793 } else if (eap_sm_method_pending(sess->eap)) {
794 radius_msg_free(sess->last_msg);
795 sess->last_msg = msg;
796 sess->last_from_port = from_port;
797 os_free(sess->last_from_addr);
798 sess->last_from_addr = os_strdup(from_addr);
799 sess->last_fromlen = fromlen;
800 os_memcpy(&sess->last_from, from, fromlen);
803 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
804 " Access-Request silently (assuming it was a "
806 data->counters.packets_dropped++;
807 client->counters.packets_dropped++;
811 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
814 reply = radius_server_encapsulate_eap(data, client, sess, msg);
818 struct radius_hdr *hdr;
820 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
821 if (wpa_debug_level <= MSG_MSGDUMP) {
822 radius_msg_dump(reply);
825 switch (radius_msg_get_hdr(reply)->code) {
826 case RADIUS_CODE_ACCESS_ACCEPT:
827 data->counters.access_accepts++;
828 client->counters.access_accepts++;
830 case RADIUS_CODE_ACCESS_REJECT:
831 data->counters.access_rejects++;
832 client->counters.access_rejects++;
834 case RADIUS_CODE_ACCESS_CHALLENGE:
835 data->counters.access_challenges++;
836 client->counters.access_challenges++;
839 buf = radius_msg_get_buf(reply);
840 res = sendto(data->auth_sock, wpabuf_head(buf),
842 (struct sockaddr *) from, fromlen);
844 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
847 radius_msg_free(sess->last_reply);
848 sess->last_reply = reply;
849 sess->last_from_port = from_port;
850 hdr = radius_msg_get_hdr(msg);
851 sess->last_identifier = hdr->identifier;
852 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
854 data->counters.packets_dropped++;
855 client->counters.packets_dropped++;
859 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
861 eloop_cancel_timeout(radius_server_session_remove_timeout,
863 eloop_register_timeout(10, 0,
864 radius_server_session_remove_timeout,
872 static void radius_server_receive_auth(int sock, void *eloop_ctx,
875 struct radius_server_data *data = eloop_ctx;
878 struct sockaddr_storage ss;
879 struct sockaddr_in sin;
881 struct sockaddr_in6 sin6;
882 #endif /* CONFIG_IPV6 */
886 struct radius_client *client = NULL;
887 struct radius_msg *msg = NULL;
891 buf = os_malloc(RADIUS_MAX_MSG_LEN);
896 fromlen = sizeof(from);
897 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
898 (struct sockaddr *) &from.ss, &fromlen);
900 wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s",
907 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
908 sizeof(abuf)) == NULL)
910 from_port = ntohs(from.sin6.sin6_port);
911 RADIUS_DEBUG("Received %d bytes from %s:%d",
912 len, abuf, from_port);
914 client = radius_server_get_client(data,
916 &from.sin6.sin6_addr, 1);
918 #endif /* CONFIG_IPV6 */
921 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
922 from_port = ntohs(from.sin.sin_port);
923 RADIUS_DEBUG("Received %d bytes from %s:%d",
924 len, abuf, from_port);
926 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
929 RADIUS_DUMP("Received data", buf, len);
931 if (client == NULL) {
932 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
933 data->counters.invalid_requests++;
937 msg = radius_msg_parse(buf, len);
939 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
940 data->counters.malformed_access_requests++;
941 client->counters.malformed_access_requests++;
948 if (wpa_debug_level <= MSG_MSGDUMP) {
949 radius_msg_dump(msg);
952 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
953 RADIUS_DEBUG("Unexpected RADIUS code %d",
954 radius_msg_get_hdr(msg)->code);
955 data->counters.unknown_types++;
956 client->counters.unknown_types++;
960 data->counters.access_requests++;
961 client->counters.access_requests++;
963 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
964 client->shared_secret_len, NULL)) {
965 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
966 data->counters.bad_authenticators++;
967 client->counters.bad_authenticators++;
971 if (radius_server_request(data, msg, (struct sockaddr *) &from,
972 fromlen, client, abuf, from_port, NULL) ==
974 return; /* msg was stored with the session */
977 radius_msg_free(msg);
982 static int radius_server_disable_pmtu_discovery(int s)
985 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
986 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
987 int action = IP_PMTUDISC_DONT;
988 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
991 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
992 "%s", strerror(errno));
998 static int radius_server_open_socket(int port)
1001 struct sockaddr_in addr;
1003 s = socket(PF_INET, SOCK_DGRAM, 0);
1005 wpa_printf(MSG_INFO, "RADIUS: socket: %s", strerror(errno));
1009 radius_server_disable_pmtu_discovery(s);
1011 os_memset(&addr, 0, sizeof(addr));
1012 addr.sin_family = AF_INET;
1013 addr.sin_port = htons(port);
1014 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1015 wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno));
1025 static int radius_server_open_socket6(int port)
1028 struct sockaddr_in6 addr;
1030 s = socket(PF_INET6, SOCK_DGRAM, 0);
1032 wpa_printf(MSG_INFO, "RADIUS: socket[IPv6]: %s",
1037 os_memset(&addr, 0, sizeof(addr));
1038 addr.sin6_family = AF_INET6;
1039 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
1040 addr.sin6_port = htons(port);
1041 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1042 wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno));
1049 #endif /* CONFIG_IPV6 */
1052 static void radius_server_free_sessions(struct radius_server_data *data,
1053 struct radius_session *sessions)
1055 struct radius_session *session, *prev;
1060 session = session->next;
1061 radius_server_session_free(data, prev);
1066 static void radius_server_free_clients(struct radius_server_data *data,
1067 struct radius_client *clients)
1069 struct radius_client *client, *prev;
1074 client = client->next;
1076 radius_server_free_sessions(data, prev->sessions);
1077 os_free(prev->shared_secret);
1083 static struct radius_client *
1084 radius_server_read_clients(const char *client_file, int ipv6)
1087 const int buf_size = 1024;
1089 struct radius_client *clients, *tail, *entry;
1090 int line = 0, mask, failed = 0, i;
1091 struct in_addr addr;
1093 struct in6_addr addr6;
1094 #endif /* CONFIG_IPV6 */
1097 f = fopen(client_file, "r");
1099 RADIUS_ERROR("Could not open client file '%s'", client_file);
1103 buf = os_malloc(buf_size);
1109 clients = tail = NULL;
1110 while (fgets(buf, buf_size, f)) {
1111 /* Configuration file format:
1112 * 192.168.1.0/24 secret
1113 * 192.168.1.2 secret
1114 * fe80::211:22ff:fe33:4455/64 secretipv6
1117 buf[buf_size - 1] = '\0';
1119 while (*pos != '\0' && *pos != '\n')
1123 if (*buf == '\0' || *buf == '#')
1127 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
1128 (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
1129 (*pos >= 'A' && *pos <= 'F')) {
1141 mask = strtol(pos, &end, 10);
1143 (mask < 0 || mask > (ipv6 ? 128 : 32))) {
1149 mask = ipv6 ? 128 : 32;
1153 if (!ipv6 && inet_aton(buf, &addr) == 0) {
1158 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
1159 if (inet_pton(AF_INET, buf, &addr) <= 0) {
1163 /* Convert IPv4 address to IPv6 */
1166 os_memset(addr6.s6_addr, 0, 10);
1167 addr6.s6_addr[10] = 0xff;
1168 addr6.s6_addr[11] = 0xff;
1169 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
1172 #endif /* CONFIG_IPV6 */
1174 while (*pos == ' ' || *pos == '\t') {
1183 entry = os_zalloc(sizeof(*entry));
1184 if (entry == NULL) {
1188 entry->shared_secret = os_strdup(pos);
1189 if (entry->shared_secret == NULL) {
1194 entry->shared_secret_len = os_strlen(entry->shared_secret);
1195 entry->addr.s_addr = addr.s_addr;
1198 for (i = 0; i < mask; i++)
1199 val |= 1 << (31 - i);
1200 entry->mask.s_addr = htonl(val);
1204 int offset = mask / 8;
1206 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
1207 os_memset(entry->mask6.s6_addr, 0xff, offset);
1209 for (i = 0; i < (mask % 8); i++)
1210 val |= 1 << (7 - i);
1212 entry->mask6.s6_addr[offset] = val;
1214 #endif /* CONFIG_IPV6 */
1217 clients = tail = entry;
1225 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1226 radius_server_free_clients(NULL, clients);
1238 * radius_server_init - Initialize RADIUS server
1239 * @conf: Configuration for the RADIUS server
1240 * Returns: Pointer to private RADIUS server context or %NULL on failure
1242 * This initializes a RADIUS server instance and returns a context pointer that
1243 * will be used in other calls to the RADIUS server module. The server can be
1244 * deinitialize by calling radius_server_deinit().
1246 struct radius_server_data *
1247 radius_server_init(struct radius_server_conf *conf)
1249 struct radius_server_data *data;
1253 wpa_printf(MSG_ERROR, "RADIUS server compiled without IPv6 support");
1256 #endif /* CONFIG_IPV6 */
1258 data = os_zalloc(sizeof(*data));
1262 os_get_reltime(&data->start_time);
1263 data->conf_ctx = conf->conf_ctx;
1264 data->eap_sim_db_priv = conf->eap_sim_db_priv;
1265 data->ssl_ctx = conf->ssl_ctx;
1266 data->msg_ctx = conf->msg_ctx;
1267 data->ipv6 = conf->ipv6;
1268 if (conf->pac_opaque_encr_key) {
1269 data->pac_opaque_encr_key = os_malloc(16);
1270 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1273 if (conf->eap_fast_a_id) {
1274 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1275 if (data->eap_fast_a_id) {
1276 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1277 conf->eap_fast_a_id_len);
1278 data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1281 if (conf->eap_fast_a_id_info)
1282 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
1283 data->eap_fast_prov = conf->eap_fast_prov;
1284 data->pac_key_lifetime = conf->pac_key_lifetime;
1285 data->pac_key_refresh_time = conf->pac_key_refresh_time;
1286 data->get_eap_user = conf->get_eap_user;
1287 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
1288 data->tnc = conf->tnc;
1289 data->wps = conf->wps;
1290 data->pwd_group = conf->pwd_group;
1291 data->server_id = conf->server_id;
1292 if (conf->eap_req_id_text) {
1293 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1294 if (data->eap_req_id_text) {
1295 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1296 conf->eap_req_id_text_len);
1297 data->eap_req_id_text_len = conf->eap_req_id_text_len;
1301 #ifdef CONFIG_RADIUS_TEST
1302 if (conf->dump_msk_file)
1303 data->dump_msk_file = os_strdup(conf->dump_msk_file);
1304 #endif /* CONFIG_RADIUS_TEST */
1306 data->clients = radius_server_read_clients(conf->client_file,
1308 if (data->clients == NULL) {
1309 wpa_printf(MSG_ERROR, "No RADIUS clients configured");
1310 radius_server_deinit(data);
1316 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1318 #endif /* CONFIG_IPV6 */
1319 data->auth_sock = radius_server_open_socket(conf->auth_port);
1320 if (data->auth_sock < 0) {
1321 wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS authentication server");
1322 radius_server_deinit(data);
1325 if (eloop_register_read_sock(data->auth_sock,
1326 radius_server_receive_auth,
1328 radius_server_deinit(data);
1337 * radius_server_deinit - Deinitialize RADIUS server
1338 * @data: RADIUS server context from radius_server_init()
1340 void radius_server_deinit(struct radius_server_data *data)
1345 if (data->auth_sock >= 0) {
1346 eloop_unregister_read_sock(data->auth_sock);
1347 close(data->auth_sock);
1350 radius_server_free_clients(data, data->clients);
1352 os_free(data->pac_opaque_encr_key);
1353 os_free(data->eap_fast_a_id);
1354 os_free(data->eap_fast_a_id_info);
1355 os_free(data->eap_req_id_text);
1356 #ifdef CONFIG_RADIUS_TEST
1357 os_free(data->dump_msk_file);
1358 #endif /* CONFIG_RADIUS_TEST */
1364 * radius_server_get_mib - Get RADIUS server MIB information
1365 * @data: RADIUS server context from radius_server_init()
1366 * @buf: Buffer for returning the MIB data in text format
1367 * @buflen: buf length in octets
1368 * Returns: Number of octets written into buf
1370 int radius_server_get_mib(struct radius_server_data *data, char *buf,
1376 struct os_reltime now;
1377 struct radius_client *cli;
1379 /* RFC 2619 - RADIUS Authentication Server MIB */
1381 if (data == NULL || buflen == 0)
1387 os_get_reltime(&now);
1388 uptime = (now.sec - data->start_time.sec) * 100 +
1389 ((now.usec - data->start_time.usec) / 10000) % 100;
1390 ret = os_snprintf(pos, end - pos,
1391 "RADIUS-AUTH-SERVER-MIB\n"
1392 "radiusAuthServIdent=hostapd\n"
1393 "radiusAuthServUpTime=%d\n"
1394 "radiusAuthServResetTime=0\n"
1395 "radiusAuthServConfigReset=4\n",
1397 if (ret < 0 || ret >= end - pos) {
1403 ret = os_snprintf(pos, end - pos,
1404 "radiusAuthServTotalAccessRequests=%u\n"
1405 "radiusAuthServTotalInvalidRequests=%u\n"
1406 "radiusAuthServTotalDupAccessRequests=%u\n"
1407 "radiusAuthServTotalAccessAccepts=%u\n"
1408 "radiusAuthServTotalAccessRejects=%u\n"
1409 "radiusAuthServTotalAccessChallenges=%u\n"
1410 "radiusAuthServTotalMalformedAccessRequests=%u\n"
1411 "radiusAuthServTotalBadAuthenticators=%u\n"
1412 "radiusAuthServTotalPacketsDropped=%u\n"
1413 "radiusAuthServTotalUnknownTypes=%u\n",
1414 data->counters.access_requests,
1415 data->counters.invalid_requests,
1416 data->counters.dup_access_requests,
1417 data->counters.access_accepts,
1418 data->counters.access_rejects,
1419 data->counters.access_challenges,
1420 data->counters.malformed_access_requests,
1421 data->counters.bad_authenticators,
1422 data->counters.packets_dropped,
1423 data->counters.unknown_types);
1424 if (ret < 0 || ret >= end - pos) {
1430 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1431 char abuf[50], mbuf[50];
1434 if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1435 sizeof(abuf)) == NULL)
1437 if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1438 sizeof(mbuf)) == NULL)
1441 #endif /* CONFIG_IPV6 */
1443 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1444 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1447 ret = os_snprintf(pos, end - pos,
1448 "radiusAuthClientIndex=%u\n"
1449 "radiusAuthClientAddress=%s/%s\n"
1450 "radiusAuthServAccessRequests=%u\n"
1451 "radiusAuthServDupAccessRequests=%u\n"
1452 "radiusAuthServAccessAccepts=%u\n"
1453 "radiusAuthServAccessRejects=%u\n"
1454 "radiusAuthServAccessChallenges=%u\n"
1455 "radiusAuthServMalformedAccessRequests=%u\n"
1456 "radiusAuthServBadAuthenticators=%u\n"
1457 "radiusAuthServPacketsDropped=%u\n"
1458 "radiusAuthServUnknownTypes=%u\n",
1461 cli->counters.access_requests,
1462 cli->counters.dup_access_requests,
1463 cli->counters.access_accepts,
1464 cli->counters.access_rejects,
1465 cli->counters.access_challenges,
1466 cli->counters.malformed_access_requests,
1467 cli->counters.bad_authenticators,
1468 cli->counters.packets_dropped,
1469 cli->counters.unknown_types);
1470 if (ret < 0 || ret >= end - pos) {
1481 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1482 size_t identity_len, int phase2,
1483 struct eap_user *user)
1485 struct radius_session *sess = ctx;
1486 struct radius_server_data *data = sess->server;
1488 return data->get_eap_user(data->conf_ctx, identity, identity_len,
1493 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1495 struct radius_session *sess = ctx;
1496 struct radius_server_data *data = sess->server;
1497 *len = data->eap_req_id_text_len;
1498 return data->eap_req_id_text;
1502 static struct eapol_callbacks radius_server_eapol_cb =
1504 .get_eap_user = radius_server_get_eap_user,
1505 .get_eap_req_id_text = radius_server_get_eap_req_id_text,
1510 * radius_server_eap_pending_cb - Pending EAP data notification
1511 * @data: RADIUS server context from radius_server_init()
1512 * @ctx: Pending EAP context pointer
1514 * This function is used to notify EAP server module that a pending operation
1515 * has been completed and processing of the EAP session can proceed.
1517 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1519 struct radius_client *cli;
1520 struct radius_session *s, *sess = NULL;
1521 struct radius_msg *msg;
1526 for (cli = data->clients; cli; cli = cli->next) {
1527 for (s = cli->sessions; s; s = s->next) {
1528 if (s->eap == ctx && s->last_msg) {
1540 RADIUS_DEBUG("No session matched callback ctx");
1544 msg = sess->last_msg;
1545 sess->last_msg = NULL;
1546 eap_sm_pending_cb(sess->eap);
1547 if (radius_server_request(data, msg,
1548 (struct sockaddr *) &sess->last_from,
1549 sess->last_fromlen, cli,
1550 sess->last_from_addr,
1551 sess->last_from_port, sess) == -2)
1552 return; /* msg was stored with the session */
1554 radius_msg_free(msg);