/* * hostapd / RADIUS authentication server * Copyright (c) 2005-2008, Jouni Malinen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Alternatively, this software may be distributed under the terms of BSD * license. * * See README and COPYING for more details. */ #include "includes.h" #include #include "common.h" #include "radius.h" #include "eloop.h" #include "config.h" #include "eap.h" #include "radius_server.h" #define RADIUS_SESSION_TIMEOUT 60 #define RADIUS_MAX_SESSION 100 #define RADIUS_MAX_MSG_LEN 3000 static struct eapol_callbacks radius_server_eapol_cb; struct radius_client; struct radius_server_data; struct radius_server_counters { u32 access_requests; u32 invalid_requests; u32 dup_access_requests; u32 access_accepts; u32 access_rejects; u32 access_challenges; u32 malformed_access_requests; u32 bad_authenticators; u32 packets_dropped; u32 unknown_types; }; struct radius_session { struct radius_session *next; struct radius_client *client; struct radius_server_data *server; unsigned int sess_id; struct eap_sm *eap; u8 *eapKeyData, *eapReqData; size_t eapKeyDataLen, eapReqDataLen; Boolean eapSuccess, eapRestart, eapFail, eapResp, eapReq, eapNoReq; Boolean portEnabled, eapTimeout; struct radius_msg *last_msg; char *last_from_addr; int last_from_port; struct sockaddr_storage last_from; socklen_t last_fromlen; u8 last_identifier; struct radius_msg *last_reply; u8 last_authenticator[16]; }; struct radius_client { struct radius_client *next; struct in_addr addr; struct in_addr mask; #ifdef CONFIG_IPV6 struct in6_addr addr6; struct in6_addr mask6; #endif /* CONFIG_IPV6 */ char *shared_secret; int shared_secret_len; struct radius_session *sessions; struct radius_server_counters counters; }; struct radius_server_data { int auth_sock; struct radius_client *clients; unsigned int next_sess_id; void *hostapd_conf; int num_sess; void *eap_sim_db_priv; void *ssl_ctx; int ipv6; struct os_time start_time; struct radius_server_counters counters; }; extern int wpa_debug_level; #define RADIUS_DEBUG(args...) \ wpa_printf(MSG_DEBUG, "RADIUS SRV: " args) #define RADIUS_ERROR(args...) \ wpa_printf(MSG_ERROR, "RADIUS SRV: " args) #define RADIUS_DUMP(args...) \ wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args) #define RADIUS_DUMP_ASCII(args...) \ wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args) static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx); static struct radius_client * radius_server_get_client(struct radius_server_data *data, struct in_addr *addr, int ipv6) { struct radius_client *client = data->clients; while (client) { #ifdef CONFIG_IPV6 if (ipv6) { struct in6_addr *addr6; int i; addr6 = (struct in6_addr *) addr; for (i = 0; i < 16; i++) { if ((addr6->s6_addr[i] & client->mask6.s6_addr[i]) != (client->addr6.s6_addr[i] & client->mask6.s6_addr[i])) { i = 17; break; } } if (i == 16) { break; } } #endif /* CONFIG_IPV6 */ if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) == (addr->s_addr & client->mask.s_addr)) { break; } client = client->next; } return client; } static struct radius_session * radius_server_get_session(struct radius_client *client, unsigned int sess_id) { struct radius_session *sess = client->sessions; while (sess) { if (sess->sess_id == sess_id) { break; } sess = sess->next; } return sess; } static void radius_server_session_free(struct radius_server_data *data, struct radius_session *sess) { eloop_cancel_timeout(radius_server_session_timeout, data, sess); free(sess->eapKeyData); free(sess->eapReqData); eap_sm_deinit(sess->eap); if (sess->last_msg) { radius_msg_free(sess->last_msg); free(sess->last_msg); } free(sess->last_from_addr); if (sess->last_reply) { radius_msg_free(sess->last_reply); free(sess->last_reply); } free(sess); data->num_sess--; } static void radius_server_session_remove_timeout(void *eloop_ctx, void *timeout_ctx); static void radius_server_session_remove(struct radius_server_data *data, struct radius_session *sess) { struct radius_client *client = sess->client; struct radius_session *session, *prev; eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); prev = NULL; session = client->sessions; while (session) { if (session == sess) { if (prev == NULL) { client->sessions = sess->next; } else { prev->next = sess->next; } radius_server_session_free(data, sess); break; } prev = session; session = session->next; } } static void radius_server_session_remove_timeout(void *eloop_ctx, void *timeout_ctx) { struct radius_server_data *data = eloop_ctx; struct radius_session *sess = timeout_ctx; RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id); radius_server_session_remove(data, sess); } static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx) { struct radius_server_data *data = eloop_ctx; struct radius_session *sess = timeout_ctx; RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id); radius_server_session_remove(data, sess); } static struct radius_session * radius_server_new_session(struct radius_server_data *data, struct radius_client *client) { struct radius_session *sess; if (data->num_sess >= RADIUS_MAX_SESSION) { RADIUS_DEBUG("Maximum number of existing session - no room " "for a new session"); return NULL; } sess = wpa_zalloc(sizeof(*sess)); if (sess == NULL) return NULL; sess->server = data; sess->client = client; sess->sess_id = data->next_sess_id++; sess->next = client->sessions; client->sessions = sess; eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0, radius_server_session_timeout, data, sess); data->num_sess++; return sess; } static struct radius_session * radius_server_get_new_session(struct radius_server_data *data, struct radius_client *client, struct radius_msg *msg) { u8 *user; size_t user_len; const struct hostapd_eap_user *eap_user; int res; struct radius_session *sess; struct eap_config eap_conf; RADIUS_DEBUG("Creating a new session"); user = malloc(256); if (user == NULL) { return NULL; } res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256); if (res < 0 || res > 256) { RADIUS_DEBUG("Could not get User-Name"); free(user); return NULL; } user_len = res; RADIUS_DUMP_ASCII("User-Name", user, user_len); eap_user = hostapd_get_eap_user(data->hostapd_conf, user, user_len, 0); free(user); if (eap_user) { RADIUS_DEBUG("Matching user entry found"); sess = radius_server_new_session(data, client); if (sess == NULL) { RADIUS_DEBUG("Failed to create a new session"); return NULL; } } else { RADIUS_DEBUG("User-Name not found from user database"); return NULL; } memset(&eap_conf, 0, sizeof(eap_conf)); eap_conf.ssl_ctx = data->ssl_ctx; eap_conf.eap_sim_db_priv = data->eap_sim_db_priv; eap_conf.backend_auth = TRUE; sess->eap = eap_sm_init(sess, &radius_server_eapol_cb, &eap_conf); if (sess->eap == NULL) { RADIUS_DEBUG("Failed to initialize EAP state machine for the " "new session"); radius_server_session_free(data, sess); return NULL; } sess->eapRestart = TRUE; sess->portEnabled = TRUE; RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id); return sess; } static struct radius_msg * radius_server_encapsulate_eap(struct radius_server_data *data, struct radius_client *client, struct radius_session *sess, struct radius_msg *request) { struct radius_msg *msg; int code; unsigned int sess_id; if (sess->eapFail) { code = RADIUS_CODE_ACCESS_REJECT; } else if (sess->eapSuccess) { code = RADIUS_CODE_ACCESS_ACCEPT; } else { code = RADIUS_CODE_ACCESS_CHALLENGE; } msg = radius_msg_new(code, request->hdr->identifier); if (msg == NULL) { RADIUS_DEBUG("Failed to allocate reply message"); return NULL; } sess_id = htonl(sess->sess_id); if (code == RADIUS_CODE_ACCESS_CHALLENGE && !radius_msg_add_attr(msg, RADIUS_ATTR_STATE, (u8 *) &sess_id, sizeof(sess_id))) { RADIUS_DEBUG("Failed to add State attribute"); } if (sess->eapReqData && !radius_msg_add_eap(msg, sess->eapReqData, sess->eapReqDataLen)) { RADIUS_DEBUG("Failed to add EAP-Message attribute"); } if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eapKeyData) { int len; if (sess->eapKeyDataLen > 64) { len = 32; } else { len = sess->eapKeyDataLen / 2; } if (!radius_msg_add_mppe_keys(msg, request->hdr->authenticator, (u8 *) client->shared_secret, client->shared_secret_len, sess->eapKeyData + len, len, sess->eapKeyData, len)) { RADIUS_DEBUG("Failed to add MPPE key attributes"); } } if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); radius_msg_free(msg); os_free(msg); return NULL; } if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, client->shared_secret_len, request->hdr->authenticator) < 0) { RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); } return msg; } static int radius_server_reject(struct radius_server_data *data, struct radius_client *client, struct radius_msg *request, struct sockaddr *from, socklen_t fromlen, const char *from_addr, int from_port) { struct radius_msg *msg; int ret = 0; struct eap_hdr eapfail; RADIUS_DEBUG("Reject invalid request from %s:%d", from_addr, from_port); msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, request->hdr->identifier); if (msg == NULL) { return -1; } memset(&eapfail, 0, sizeof(eapfail)); eapfail.code = EAP_CODE_FAILURE; eapfail.identifier = 0; eapfail.length = htons(sizeof(eapfail)); if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) { RADIUS_DEBUG("Failed to add EAP-Message attribute"); } if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); radius_msg_free(msg); os_free(msg); return -1; } if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, client->shared_secret_len, request->hdr->authenticator) < 0) { RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); } if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(msg); } data->counters.access_rejects++; client->counters.access_rejects++; if (sendto(data->auth_sock, msg->buf, msg->buf_used, 0, (struct sockaddr *) from, sizeof(*from)) < 0) { perror("sendto[RADIUS SRV]"); ret = -1; } radius_msg_free(msg); free(msg); return ret; } static int radius_server_request(struct radius_server_data *data, struct radius_msg *msg, struct sockaddr *from, socklen_t fromlen, struct radius_client *client, const char *from_addr, int from_port, struct radius_session *force_sess) { u8 *eap = NULL; size_t eap_len; int res, state_included = 0; u8 statebuf[4], resp_id; unsigned int state; struct radius_session *sess; struct radius_msg *reply; struct eap_hdr *hdr; if (force_sess) sess = force_sess; else { res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf, sizeof(statebuf)); state_included = res >= 0; if (res == sizeof(statebuf)) { state = (statebuf[0] << 24) | (statebuf[1] << 16) | (statebuf[2] << 8) | statebuf[3]; sess = radius_server_get_session(client, state); } else { sess = NULL; } } if (sess) { RADIUS_DEBUG("Request for session 0x%x", sess->sess_id); } else if (state_included) { RADIUS_DEBUG("State attribute included but no session found"); radius_server_reject(data, client, msg, from, fromlen, from_addr, from_port); return -1; } else { sess = radius_server_get_new_session(data, client, msg); if (sess == NULL) { RADIUS_DEBUG("Could not create a new session"); radius_server_reject(data, client, msg, from, fromlen, from_addr, from_port); return -1; } } if (sess->last_from_port == from_port && sess->last_identifier == msg->hdr->identifier && os_memcmp(sess->last_authenticator, msg->hdr->authenticator, 16) == 0) { RADIUS_DEBUG("Duplicate message from %s", from_addr); data->counters.dup_access_requests++; client->counters.dup_access_requests++; if (sess->last_reply) { res = sendto(data->auth_sock, sess->last_reply->buf, sess->last_reply->buf_used, 0, (struct sockaddr *) from, fromlen); if (res < 0) { perror("sendto[RADIUS SRV]"); } return 0; } RADIUS_DEBUG("No previous reply available for duplicate " "message"); return -1; } eap = radius_msg_get_eap(msg, &eap_len); if (eap == NULL) { RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s", from_addr); data->counters.packets_dropped++; client->counters.packets_dropped++; return -1; } RADIUS_DUMP("Received EAP data", eap, eap_len); if (eap_len >= sizeof(*hdr)) { hdr = (struct eap_hdr *) eap; resp_id = hdr->identifier; } else { resp_id = 0; } /* FIX: if Code is Request, Success, or Failure, send Access-Reject; * RFC3579 Sect. 2.6.2. * Include EAP-Response/Nak with no preferred method if * code == request. * If code is not 1-4, discard the packet silently. * Or is this already done by the EAP state machine? */ eap_set_eapRespData(sess->eap, eap, eap_len); free(eap); eap = NULL; sess->eapResp = TRUE; eap_sm_step(sess->eap); if (sess->eapReqData) { RADIUS_DUMP("EAP data from the state machine", sess->eapReqData, sess->eapReqDataLen); } else if (sess->eapFail) { RADIUS_DEBUG("No EAP data from the state machine, but eapFail " "set - generate EAP-Failure"); hdr = wpa_zalloc(sizeof(*hdr)); if (hdr) { hdr->identifier = resp_id; hdr->length = htons(sizeof(*hdr)); sess->eapReqData = (u8 *) hdr; sess->eapReqDataLen = sizeof(*hdr); } } else if (eap_sm_method_pending(sess->eap)) { if (sess->last_msg) { radius_msg_free(sess->last_msg); free(sess->last_msg); } sess->last_msg = msg; sess->last_from_port = from_port; free(sess->last_from_addr); sess->last_from_addr = strdup(from_addr); sess->last_fromlen = fromlen; memcpy(&sess->last_from, from, fromlen); return -2; } else { RADIUS_DEBUG("No EAP data from the state machine - ignore this" " Access-Request silently (assuming it was a " "duplicate)"); data->counters.packets_dropped++; client->counters.packets_dropped++; return -1; } reply = radius_server_encapsulate_eap(data, client, sess, msg); free(sess->eapReqData); sess->eapReqData = NULL; sess->eapReqDataLen = 0; if (reply) { RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port); if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(reply); } switch (reply->hdr->code) { case RADIUS_CODE_ACCESS_ACCEPT: data->counters.access_accepts++; client->counters.access_accepts++; break; case RADIUS_CODE_ACCESS_REJECT: data->counters.access_rejects++; client->counters.access_rejects++; break; case RADIUS_CODE_ACCESS_CHALLENGE: data->counters.access_challenges++; client->counters.access_challenges++; break; } res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0, (struct sockaddr *) from, fromlen); if (res < 0) { perror("sendto[RADIUS SRV]"); } if (sess->last_reply) { radius_msg_free(sess->last_reply); free(sess->last_reply); } sess->last_reply = reply; sess->last_from_port = from_port; sess->last_identifier = msg->hdr->identifier; os_memcpy(sess->last_authenticator, msg->hdr->authenticator, 16); } else { data->counters.packets_dropped++; client->counters.packets_dropped++; } if (sess->eapSuccess || sess->eapFail) { RADIUS_DEBUG("Removing completed session 0x%x after timeout", sess->sess_id); eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); eloop_register_timeout(10, 0, radius_server_session_remove_timeout, data, sess); } return 0; } static void radius_server_receive_auth(int sock, void *eloop_ctx, void *sock_ctx) { struct radius_server_data *data = eloop_ctx; u8 *buf = NULL; struct sockaddr_storage from; socklen_t fromlen; int len; struct radius_client *client = NULL; struct radius_msg *msg = NULL; char abuf[50]; int from_port = 0; buf = malloc(RADIUS_MAX_MSG_LEN); if (buf == NULL) { goto fail; } fromlen = sizeof(from); len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, (struct sockaddr *) &from, &fromlen); if (len < 0) { perror("recvfrom[radius_server]"); goto fail; } #ifdef CONFIG_IPV6 if (data->ipv6) { struct sockaddr_in6 *from6 = (struct sockaddr_in6 *) &from; if (inet_ntop(AF_INET6, &from6->sin6_addr, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; from_port = ntohs(from6->sin6_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, (struct in_addr *) &from6->sin6_addr, 1); } #endif /* CONFIG_IPV6 */ if (!data->ipv6) { struct sockaddr_in *from4 = (struct sockaddr_in *) &from; snprintf(abuf, sizeof(abuf), "%s", inet_ntoa(from4->sin_addr)); from_port = ntohs(from4->sin_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, &from4->sin_addr, 0); } RADIUS_DUMP("Received data", buf, len); if (client == NULL) { RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); data->counters.invalid_requests++; goto fail; } msg = radius_msg_parse(buf, len); if (msg == NULL) { RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); data->counters.malformed_access_requests++; client->counters.malformed_access_requests++; goto fail; } free(buf); buf = NULL; if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(msg); } if (msg->hdr->code != RADIUS_CODE_ACCESS_REQUEST) { RADIUS_DEBUG("Unexpected RADIUS code %d", msg->hdr->code); data->counters.unknown_types++; client->counters.unknown_types++; goto fail; } data->counters.access_requests++; client->counters.access_requests++; if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret, client->shared_secret_len, NULL)) { RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf); data->counters.bad_authenticators++; client->counters.bad_authenticators++; goto fail; } if (radius_server_request(data, msg, (struct sockaddr *) &from, fromlen, client, abuf, from_port, NULL) == -2) return; /* msg was stored with the session */ fail: if (msg) { radius_msg_free(msg); free(msg); } free(buf); } static int radius_server_open_socket(int port) { int s; struct sockaddr_in addr; s = socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { perror("socket"); return -1; } memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(port); if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { perror("bind"); close(s); return -1; } return s; } #ifdef CONFIG_IPV6 static int radius_server_open_socket6(int port) { int s; struct sockaddr_in6 addr; s = socket(PF_INET6, SOCK_DGRAM, 0); if (s < 0) { perror("socket[IPv6]"); return -1; } memset(&addr, 0, sizeof(addr)); addr.sin6_family = AF_INET6; memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)); addr.sin6_port = htons(port); if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { perror("bind"); close(s); return -1; } return s; } #endif /* CONFIG_IPV6 */ static void radius_server_free_sessions(struct radius_server_data *data, struct radius_session *sessions) { struct radius_session *session, *prev; session = sessions; while (session) { prev = session; session = session->next; radius_server_session_free(data, prev); } } static void radius_server_free_clients(struct radius_server_data *data, struct radius_client *clients) { struct radius_client *client, *prev; client = clients; while (client) { prev = client; client = client->next; radius_server_free_sessions(data, prev->sessions); free(prev->shared_secret); free(prev); } } static struct radius_client * radius_server_read_clients(const char *client_file, int ipv6) { FILE *f; const int buf_size = 1024; char *buf, *pos; struct radius_client *clients, *tail, *entry; int line = 0, mask, failed = 0, i; struct in_addr addr; #ifdef CONFIG_IPV6 struct in6_addr addr6; #endif /* CONFIG_IPV6 */ unsigned int val; f = fopen(client_file, "r"); if (f == NULL) { RADIUS_ERROR("Could not open client file '%s'", client_file); return NULL; } buf = malloc(buf_size); if (buf == NULL) { fclose(f); return NULL; } clients = tail = NULL; while (fgets(buf, buf_size, f)) { /* Configuration file format: * 192.168.1.0/24 secret * 192.168.1.2 secret * fe80::211:22ff:fe33:4455/64 secretipv6 */ line++; buf[buf_size - 1] = '\0'; pos = buf; while (*pos != '\0' && *pos != '\n') pos++; if (*pos == '\n') *pos = '\0'; if (*buf == '\0' || *buf == '#') continue; pos = buf; while ((*pos >= '0' && *pos <= '9') || *pos == '.' || (*pos >= 'a' && *pos <= 'f') || *pos == ':' || (*pos >= 'A' && *pos <= 'F')) { pos++; } if (*pos == '\0') { failed = 1; break; } if (*pos == '/') { char *end; *pos++ = '\0'; mask = strtol(pos, &end, 10); if ((pos == end) || (mask < 0 || mask > (ipv6 ? 128 : 32))) { failed = 1; break; } pos = end; } else { mask = ipv6 ? 128 : 32; *pos++ = '\0'; } if (!ipv6 && inet_aton(buf, &addr) == 0) { failed = 1; break; } #ifdef CONFIG_IPV6 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) { if (inet_pton(AF_INET, buf, &addr) <= 0) { failed = 1; break; } /* Convert IPv4 address to IPv6 */ if (mask <= 32) mask += (128 - 32); memset(addr6.s6_addr, 0, 10); addr6.s6_addr[10] = 0xff; addr6.s6_addr[11] = 0xff; memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr, 4); } #endif /* CONFIG_IPV6 */ while (*pos == ' ' || *pos == '\t') { pos++; } if (*pos == '\0') { failed = 1; break; } entry = wpa_zalloc(sizeof(*entry)); if (entry == NULL) { failed = 1; break; } entry->shared_secret = strdup(pos); if (entry->shared_secret == NULL) { failed = 1; free(entry); break; } entry->shared_secret_len = strlen(entry->shared_secret); entry->addr.s_addr = addr.s_addr; if (!ipv6) { val = 0; for (i = 0; i < mask; i++) val |= 1 << (31 - i); entry->mask.s_addr = htonl(val); } #ifdef CONFIG_IPV6 if (ipv6) { int offset = mask / 8; memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16); memset(entry->mask6.s6_addr, 0xff, offset); val = 0; for (i = 0; i < (mask % 8); i++) val |= 1 << (7 - i); if (offset < 16) entry->mask6.s6_addr[offset] = val; } #endif /* CONFIG_IPV6 */ if (tail == NULL) { clients = tail = entry; } else { tail->next = entry; tail = entry; } } if (failed) { RADIUS_ERROR("Invalid line %d in '%s'", line, client_file); radius_server_free_clients(NULL, clients); clients = NULL; } free(buf); fclose(f); return clients; } struct radius_server_data * radius_server_init(struct radius_server_conf *conf) { struct radius_server_data *data; #ifndef CONFIG_IPV6 if (conf->ipv6) { fprintf(stderr, "RADIUS server compiled without IPv6 " "support.\n"); return NULL; } #endif /* CONFIG_IPV6 */ data = wpa_zalloc(sizeof(*data)); if (data == NULL) return NULL; os_get_time(&data->start_time); data->hostapd_conf = conf->hostapd_conf; data->eap_sim_db_priv = conf->eap_sim_db_priv; data->ssl_ctx = conf->ssl_ctx; data->ipv6 = conf->ipv6; data->clients = radius_server_read_clients(conf->client_file, conf->ipv6); if (data->clients == NULL) { printf("No RADIUS clients configured.\n"); radius_server_deinit(data); return NULL; } #ifdef CONFIG_IPV6 if (conf->ipv6) data->auth_sock = radius_server_open_socket6(conf->auth_port); else #endif /* CONFIG_IPV6 */ data->auth_sock = radius_server_open_socket(conf->auth_port); if (data->auth_sock < 0) { printf("Failed to open UDP socket for RADIUS authentication " "server\n"); radius_server_deinit(data); return NULL; } if (eloop_register_read_sock(data->auth_sock, radius_server_receive_auth, data, NULL)) { radius_server_deinit(data); return NULL; } return data; } void radius_server_deinit(struct radius_server_data *data) { if (data == NULL) return; if (data->auth_sock >= 0) { eloop_unregister_read_sock(data->auth_sock); close(data->auth_sock); } radius_server_free_clients(data, data->clients); free(data); } int radius_server_get_mib(struct radius_server_data *data, char *buf, size_t buflen) { int ret, uptime; unsigned int idx; char *end, *pos; struct os_time now; struct radius_client *cli; /* RFC 2619 - RADIUS Authentication Server MIB */ if (data == NULL || buflen == 0) return 0; pos = buf; end = buf + buflen; os_get_time(&now); uptime = (now.sec - data->start_time.sec) * 100 + ((now.usec - data->start_time.usec) / 10000) % 100; ret = snprintf(pos, end - pos, "RADIUS-AUTH-SERVER-MIB\n" "radiusAuthServIdent=hostapd\n" "radiusAuthServUpTime=%d\n" "radiusAuthServResetTime=0\n" "radiusAuthServConfigReset=4\n", uptime); if (ret < 0 || ret >= end - pos) { *pos = '\0'; return pos - buf; } pos += ret; ret = snprintf(pos, end - pos, "radiusAuthServTotalAccessRequests=%u\n" "radiusAuthServTotalInvalidRequests=%u\n" "radiusAuthServTotalDupAccessRequests=%u\n" "radiusAuthServTotalAccessAccepts=%u\n" "radiusAuthServTotalAccessRejects=%u\n" "radiusAuthServTotalAccessChallenges=%u\n" "radiusAuthServTotalMalformedAccessRequests=%u\n" "radiusAuthServTotalBadAuthenticators=%u\n" "radiusAuthServTotalPacketsDropped=%u\n" "radiusAuthServTotalUnknownTypes=%u\n", data->counters.access_requests, data->counters.invalid_requests, data->counters.dup_access_requests, data->counters.access_accepts, data->counters.access_rejects, data->counters.access_challenges, data->counters.malformed_access_requests, data->counters.bad_authenticators, data->counters.packets_dropped, data->counters.unknown_types); if (ret < 0 || ret >= end - pos) { *pos = '\0'; return pos - buf; } pos += ret; for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) { char abuf[50], mbuf[50]; #ifdef CONFIG_IPV6 if (data->ipv6) { if (inet_ntop(AF_INET6, &cli->addr6, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; if (inet_ntop(AF_INET6, &cli->mask6, abuf, sizeof(mbuf)) == NULL) mbuf[0] = '\0'; } #endif /* CONFIG_IPV6 */ if (!data->ipv6) { snprintf(abuf, sizeof(abuf), "%s", inet_ntoa(cli->addr)); snprintf(mbuf, sizeof(mbuf), "%s", inet_ntoa(cli->mask)); } ret = snprintf(pos, end - pos, "radiusAuthClientIndex=%u\n" "radiusAuthClientAddress=%s/%s\n" "radiusAuthServAccessRequests=%u\n" "radiusAuthServDupAccessRequests=%u\n" "radiusAuthServAccessAccepts=%u\n" "radiusAuthServAccessRejects=%u\n" "radiusAuthServAccessChallenges=%u\n" "radiusAuthServMalformedAccessRequests=%u\n" "radiusAuthServBadAuthenticators=%u\n" "radiusAuthServPacketsDropped=%u\n" "radiusAuthServUnknownTypes=%u\n", idx, abuf, mbuf, cli->counters.access_requests, cli->counters.dup_access_requests, cli->counters.access_accepts, cli->counters.access_rejects, cli->counters.access_challenges, cli->counters.malformed_access_requests, cli->counters.bad_authenticators, cli->counters.packets_dropped, cli->counters.unknown_types); if (ret < 0 || ret >= end - pos) { *pos = '\0'; return pos - buf; } pos += ret; } return pos - buf; } static Boolean radius_server_get_bool(void *ctx, enum eapol_bool_var variable) { struct radius_session *sess = ctx; if (sess == NULL) return FALSE; switch (variable) { case EAPOL_eapSuccess: return sess->eapSuccess; case EAPOL_eapRestart: return sess->eapRestart; case EAPOL_eapFail: return sess->eapFail; case EAPOL_eapResp: return sess->eapResp; case EAPOL_eapReq: return sess->eapReq; case EAPOL_eapNoReq: return sess->eapNoReq; case EAPOL_portEnabled: return sess->portEnabled; case EAPOL_eapTimeout: return sess->eapTimeout; } return FALSE; } static void radius_server_set_bool(void *ctx, enum eapol_bool_var variable, Boolean value) { struct radius_session *sess = ctx; if (sess == NULL) return; switch (variable) { case EAPOL_eapSuccess: sess->eapSuccess = value; break; case EAPOL_eapRestart: sess->eapRestart = value; break; case EAPOL_eapFail: sess->eapFail = value; break; case EAPOL_eapResp: sess->eapResp = value; break; case EAPOL_eapReq: sess->eapReq = value; break; case EAPOL_eapNoReq: sess->eapNoReq = value; break; case EAPOL_portEnabled: sess->portEnabled = value; break; case EAPOL_eapTimeout: sess->eapTimeout = value; break; } } static void radius_server_set_eapReqData(void *ctx, const u8 *eapReqData, size_t eapReqDataLen) { struct radius_session *sess = ctx; if (sess == NULL) return; free(sess->eapReqData); sess->eapReqData = malloc(eapReqDataLen); if (sess->eapReqData) { memcpy(sess->eapReqData, eapReqData, eapReqDataLen); sess->eapReqDataLen = eapReqDataLen; } else { sess->eapReqDataLen = 0; } } static void radius_server_set_eapKeyData(void *ctx, const u8 *eapKeyData, size_t eapKeyDataLen) { struct radius_session *sess = ctx; if (sess == NULL) return; free(sess->eapKeyData); if (eapKeyData) { sess->eapKeyData = malloc(eapKeyDataLen); if (sess->eapKeyData) { memcpy(sess->eapKeyData, eapKeyData, eapKeyDataLen); sess->eapKeyDataLen = eapKeyDataLen; } else { sess->eapKeyDataLen = 0; } } else { sess->eapKeyData = NULL; sess->eapKeyDataLen = 0; } } static int radius_server_get_eap_user(void *ctx, const u8 *identity, size_t identity_len, int phase2, struct eap_user *user) { struct radius_session *sess = ctx; const struct hostapd_eap_user *eap_user; int i, count; eap_user = hostapd_get_eap_user(sess->server->hostapd_conf, identity, identity_len, phase2); if (eap_user == NULL) return -1; memset(user, 0, sizeof(*user)); count = EAP_USER_MAX_METHODS; if (count > EAP_MAX_METHODS) count = EAP_MAX_METHODS; for (i = 0; i < count; i++) { user->methods[i].vendor = eap_user->methods[i].vendor; user->methods[i].method = eap_user->methods[i].method; } if (eap_user->password) { user->password = malloc(eap_user->password_len); if (user->password == NULL) return -1; memcpy(user->password, eap_user->password, eap_user->password_len); user->password_len = eap_user->password_len; user->password_hash = eap_user->password_hash; } user->force_version = eap_user->force_version; return 0; } static struct eapol_callbacks radius_server_eapol_cb = { .get_bool = radius_server_get_bool, .set_bool = radius_server_set_bool, .set_eapReqData = radius_server_set_eapReqData, .set_eapKeyData = radius_server_set_eapKeyData, .get_eap_user = radius_server_get_eap_user, }; void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx) { struct radius_client *cli; struct radius_session *s, *sess = NULL; struct radius_msg *msg; if (data == NULL) return; for (cli = data->clients; cli; cli = cli->next) { for (s = cli->sessions; s; s = s->next) { if (s->eap == ctx && s->last_msg) { sess = s; break; } if (sess) break; } if (sess) break; } if (sess == NULL) { RADIUS_DEBUG("No session matched callback ctx"); return; } msg = sess->last_msg; sess->last_msg = NULL; eap_sm_pending_cb(sess->eap); if (radius_server_request(data, msg, (struct sockaddr *) &sess->last_from, sess->last_fromlen, cli, sess->last_from_addr, sess->last_from_port, sess) == -2) return; /* msg was stored with the session */ radius_msg_free(msg); free(msg); }