Esempio n. 1
0
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;
	struct wpabuf *buf;
	struct radius_hdr *hdr = radius_msg_get_hdr(request);

	RADIUS_DEBUG("Reject invalid request from %s:%d",
		     from_addr, from_port);

	msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
	if (msg == NULL) {
		return -1;
	}

	os_memset(&eapfail, 0, sizeof(eapfail));
	eapfail.code = EAP_CODE_FAILURE;
	eapfail.identifier = 0;
	eapfail.length = host_to_be16(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);
		return -1;
	}

	if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
				  client->shared_secret_len,
				  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++;
	buf = radius_msg_get_buf(msg);
	if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
		   (struct sockaddr *) from, sizeof(*from)) < 0) {
		wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno));
		ret = -1;
	}

	radius_msg_free(msg);

	return ret;
}
Esempio n. 2
0
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) {
		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_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;
}
Esempio n. 3
0
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 = os_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;
}
Esempio n. 4
0
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);
}
Esempio n. 5
0
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);
}
Esempio n. 6
0
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 = VM_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");
		VM_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);
	VM_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;
}
Esempio n. 7
0
static int radius_server_reject(struct radius_server_data *data,
				struct radius_client *client,
				struct radius_msg *request,
				struct sockaddr_in *from)
{
	struct radius_msg *msg;
	int ret = 0;

	RADIUS_DEBUG("Reject invalid request from %s:%d",
		     inet_ntoa(from->sin_addr), ntohs(from->sin_port));

	msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT,
			     request->hdr->identifier);
	if (msg == NULL) {
		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);
	}

	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;
}
Esempio n. 8
0
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);
	os_free(msg);
}
Esempio n. 9
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;
	union {
		struct sockaddr_storage ss;
		struct sockaddr_in sin;
#ifdef CONFIG_IPV6
		struct sockaddr_in6 sin6;
#endif /* CONFIG_IPV6 */
	} from;
	socklen_t fromlen;
	int len;
	struct radius_client *client = NULL;
	struct radius_msg *msg = NULL;
	char abuf[50];
	int from_port = 0;

	buf = os_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.ss, &fromlen);
	if (len < 0) {
		perror("recvfrom[radius_server]");
		goto fail;
	}

#ifdef CONFIG_IPV6
	if (data->ipv6) {
		if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
			      sizeof(abuf)) == NULL)
			abuf[0] = '\0';
		from_port = ntohs(from.sin6.sin6_port);
		RADIUS_DEBUG("Received %d bytes from %s:%d",
			     len, abuf, from_port);

		client = radius_server_get_client(data,
						  (struct in_addr *)
						  &from.sin6.sin6_addr, 1);
	}
#endif /* CONFIG_IPV6 */

	if (!data->ipv6) {
		os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
		from_port = ntohs(from.sin.sin_port);
		RADIUS_DEBUG("Received %d bytes from %s:%d",
			     len, abuf, from_port);

		client = radius_server_get_client(data, &from.sin.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;
	}

	os_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);
		os_free(msg);
	}
	os_free(buf);
}
Esempio n. 10
0
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];
	unsigned int state;
	struct radius_session *sess;
	struct radius_msg *reply;
	int is_complete = 0;

	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 = WPA_GET_BE32(statebuf);
			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);

	/* 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? */

	wpabuf_free(sess->eap_if->eapRespData);
	sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
	if (sess->eap_if->eapRespData == NULL)
		os_free(eap);
	eap = NULL;
	sess->eap_if->eapResp = TRUE;
	eap_server_sm_step(sess->eap);

	if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
	     sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
		RADIUS_DUMP("EAP data from the state machine",
			    wpabuf_head(sess->eap_if->eapReqData),
			    wpabuf_len(sess->eap_if->eapReqData));
	} else if (sess->eap_if->eapFail) {
		RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
			     "set");
	} else if (eap_sm_method_pending(sess->eap)) {
		if (sess->last_msg) {
			radius_msg_free(sess->last_msg);
			os_free(sess->last_msg);
		}
		sess->last_msg = msg;
		sess->last_from_port = from_port;
		os_free(sess->last_from_addr);
		sess->last_from_addr = os_strdup(from_addr);
		sess->last_fromlen = fromlen;
		os_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;
	}

	if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
		is_complete = 1;

	reply = radius_server_encapsulate_eap(data, client, sess, msg);

	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);
			os_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 (is_complete) {
		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;
}
Esempio n. 11
0
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;
	int res;
	struct radius_session *sess;
	struct eap_config eap_conf;

	RADIUS_DEBUG("Creating a new session");

	user = os_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");
		os_free(user);
		return NULL;
	}
	user_len = res;
	RADIUS_DUMP_ASCII("User-Name", user, user_len);

	res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
	os_free(user);

	if (res == 0) {
		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;
	}

	os_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;
	eap_conf.eap_server = 1;
	eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
	eap_conf.eap_fast_a_id = data->eap_fast_a_id;
	eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
	eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
	eap_conf.eap_fast_prov = data->eap_fast_prov;
	eap_conf.pac_key_lifetime = data->pac_key_lifetime;
	eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
	eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
	eap_conf.tnc = data->tnc;
	eap_conf.wps = data->wps;
	sess->eap = eap_server_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->eap_if = eap_get_interface(sess->eap);
	sess->eap_if->eapRestart = TRUE;
	sess->eap_if->portEnabled = TRUE;

	RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);

	return sess;
}
Esempio n. 12
0
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;
	struct radius_hdr *hdr = radius_msg_get_hdr(request);

	if (sess->eap_if->eapFail) {
		sess->eap_if->eapFail = FALSE;
		code = RADIUS_CODE_ACCESS_REJECT;
	} else if (sess->eap_if->eapSuccess) {
		sess->eap_if->eapSuccess = FALSE;
		code = RADIUS_CODE_ACCESS_ACCEPT;
	} else {
		sess->eap_if->eapReq = FALSE;
		code = RADIUS_CODE_ACCESS_CHALLENGE;
	}

	msg = radius_msg_new(code, 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->eap_if->eapReqData &&
	    !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
				wpabuf_len(sess->eap_if->eapReqData))) {
		RADIUS_DEBUG("Failed to add EAP-Message attribute");
	}

	if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
		int len;
#ifdef CONFIG_RADIUS_TEST
		if (data->dump_msk_file) {
			FILE *f;
			char buf[2 * 64 + 1];
			f = fopen(data->dump_msk_file, "a");
			if (f) {
				len = sess->eap_if->eapKeyDataLen;
				if (len > 64)
					len = 64;
				len = wpa_snprintf_hex(
					buf, sizeof(buf),
					sess->eap_if->eapKeyData, len);
				buf[len] = '\0';
				fprintf(f, "%s\n", buf);
				fclose(f);
			}
		}
#endif /* CONFIG_RADIUS_TEST */
		if (sess->eap_if->eapKeyDataLen > 64) {
			len = 32;
		} else {
			len = sess->eap_if->eapKeyDataLen / 2;
		}
		if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
					      (u8 *) client->shared_secret,
					      client->shared_secret_len,
					      sess->eap_if->eapKeyData + len,
					      len, sess->eap_if->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);
		return NULL;
	}

	if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
				  client->shared_secret_len,
				  hdr->authenticator) < 0) {
		RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
	}

	return msg;
}
Esempio n. 13
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_in from;
	socklen_t fromlen;
	int len;
	struct radius_client *client;
	struct radius_msg *msg = NULL;

	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;
	}

	RADIUS_DEBUG("Received %d bytes from %s:%d",
		     len, inet_ntoa(from.sin_addr), ntohs(from.sin_port));
	RADIUS_DUMP("Received data", buf, len);

	client = radius_server_get_client(data, &from.sin_addr);
	if (client == NULL) {
		RADIUS_DEBUG("Unknown client %s - packet ignored",
			     inet_ntoa(from.sin_addr));
		goto fail;
	}

	msg = radius_msg_parse(buf, len);
	if (msg == NULL) {
		RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
		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);
		goto fail;
	}

	if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
				       client->shared_secret_len, NULL)) {
		RADIUS_DEBUG("Invalid Message-Authenticator from %s",
			     inet_ntoa(from.sin_addr));
		goto fail;
	}

	radius_server_request(data, msg, &from, client);

fail:
	if (msg) {
		radius_msg_free(msg);
		free(msg);
	}
	free(buf);
}
Esempio n. 14
0
static int radius_server_request(struct radius_server_data *data,
				 struct radius_msg *msg,
				 struct sockaddr_in *from,
				 struct radius_client *client)
{
	u8 *eap = NULL;
	size_t eap_len;
	int res, state_included;
	u8 statebuf[4], resp_id;
	unsigned int state;
	struct radius_session *sess;
	struct radius_msg *reply;
	struct eap_hdr *hdr;

	/* TODO: Implement duplicate packet processing */

	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);
		return -1;
	} else {
		sess = radius_server_get_new_session(data, client, msg);
		if (sess == NULL) {
			RADIUS_DEBUG("Could not create a new session");
			return -1;
		}
	}

	eap = radius_msg_get_eap(msg, &eap_len);
	if (eap == NULL) {
		RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
			     inet_ntoa(from->sin_addr));
		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;
	}

	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 = malloc(sizeof(*hdr));
		if (hdr) {
			memset(hdr, 0, sizeof(*hdr));
			hdr->identifier = resp_id;
			hdr->length = htons(sizeof(*hdr));
			sess->eapReqData = (u8 *) hdr;
			sess->eapReqDataLen = sizeof(*hdr);
		}
	} else {
		RADIUS_DEBUG("No EAP data from the state machine - ignore this"
			     " Access-Request silently (assuming it was a "
			     "duplicate)");
		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", inet_ntoa(from->sin_addr),
			     ntohs(from->sin_port));
		if (wpa_debug_level <= MSG_MSGDUMP) {
			radius_msg_dump(reply);
		}

		res = sendto(data->auth_sock, reply->buf, reply->buf_used, 0,
			     (struct sockaddr *) from, sizeof(*from));
		if (res < 0) {
			perror("sendto[RADIUS SRV]");
		}
		radius_msg_free(reply);
		free(reply);
	}

	if (sess->eapSuccess || sess->eapFail) {
		RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
		radius_server_session_remove(data, sess);
	}

	return 0;
}