+++ /dev/null
-/*
- * RADIUS authentication server
- * Copyright (c) 2005-2009, Jouni Malinen <j@w1.fi>
- *
- * 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 <net/if.h>
-
-#include "common.h"
-#include "radius.h"
-#include "eloop.h"
-#include "eap_server/eap.h"
-#include "radius_server.h"
-
-/**
- * RADIUS_SESSION_TIMEOUT - Session timeout in seconds
- */
-#define RADIUS_SESSION_TIMEOUT 60
-
-/**
- * RADIUS_MAX_SESSION - Maximum number of active sessions
- */
-#define RADIUS_MAX_SESSION 100
-
-/**
- * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
- */
-#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 - RADIUS server statistics counters
- */
-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 - Internal RADIUS server data for a session
- */
-struct radius_session {
- struct radius_session *next;
- struct radius_client *client;
- struct radius_server_data *server;
- unsigned int sess_id;
- struct eap_sm *eap;
- struct eap_eapol_interface *eap_if;
-
- 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 - Internal RADIUS server data for a client
- */
-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 - Internal RADIUS server data
- */
-struct radius_server_data {
- /**
- * auth_sock - Socket for RADIUS authentication messages
- */
- int auth_sock;
-
- /**
- * clients - List of authorized RADIUS clients
- */
- struct radius_client *clients;
-
- /**
- * next_sess_id - Next session identifier
- */
- unsigned int next_sess_id;
-
- /**
- * conf_ctx - Context pointer for callbacks
- *
- * This is used as the ctx argument in get_eap_user() calls.
- */
- void *conf_ctx;
-
- /**
- * num_sess - Number of active sessions
- */
- int num_sess;
-
- /**
- * eap_sim_db_priv - EAP-SIM/AKA database context
- *
- * This is passed to the EAP-SIM/AKA server implementation as a
- * callback context.
- */
- void *eap_sim_db_priv;
-
- /**
- * ssl_ctx - TLS context
- *
- * This is passed to the EAP server implementation as a callback
- * context for TLS operations.
- */
- void *ssl_ctx;
-
- /**
- * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST
- *
- * This parameter is used to set a key for EAP-FAST to encrypt the
- * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If
- * set, must point to a 16-octet key.
- */
- u8 *pac_opaque_encr_key;
-
- /**
- * eap_fast_a_id - EAP-FAST authority identity (A-ID)
- *
- * If EAP-FAST is not used, this can be set to %NULL. In theory, this
- * is a variable length field, but due to some existing implementations
- * requiring A-ID to be 16 octets in length, it is recommended to use
- * that length for the field to provide interoperability with deployed
- * peer implementations.
- */
- u8 *eap_fast_a_id;
-
- /**
- * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets
- */
- size_t eap_fast_a_id_len;
-
- /**
- * eap_fast_a_id_info - EAP-FAST authority identifier information
- *
- * This A-ID-Info contains a user-friendly name for the A-ID. For
- * example, this could be the enterprise and server names in
- * human-readable format. This field is encoded as UTF-8. If EAP-FAST
- * is not used, this can be set to %NULL.
- */
- char *eap_fast_a_id_info;
-
- /**
- * eap_fast_prov - EAP-FAST provisioning modes
- *
- * 0 = provisioning disabled, 1 = only anonymous provisioning allowed,
- * 2 = only authenticated provisioning allowed, 3 = both provisioning
- * modes allowed.
- */
- int eap_fast_prov;
-
- /**
- * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds
- *
- * This is the hard limit on how long a provisioned PAC-Key can be
- * used.
- */
- int pac_key_lifetime;
-
- /**
- * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds
- *
- * This is a soft limit on the PAC-Key. The server will automatically
- * generate a new PAC-Key when this number of seconds (or fewer) of the
- * lifetime remains.
- */
- int pac_key_refresh_time;
-
- /**
- * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication
- *
- * This controls whether the protected success/failure indication
- * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA.
- */
- int eap_sim_aka_result_ind;
-
- /**
- * tnc - Trusted Network Connect (TNC)
- *
- * This controls whether TNC is enabled and will be required before the
- * peer is allowed to connect. Note: This is only used with EAP-TTLS
- * and EAP-FAST. If any other EAP method is enabled, the peer will be
- * allowed to connect without TNC.
- */
- int tnc;
-
- /**
- * pwd_group - The D-H group assigned for EAP-pwd
- *
- * If EAP-pwd is not used it can be set to zero.
- */
- u16 pwd_group;
-
- /**
- * wps - Wi-Fi Protected Setup context
- *
- * If WPS is used with an external RADIUS server (which is quite
- * unlikely configuration), this is used to provide a pointer to WPS
- * context data. Normally, this can be set to %NULL.
- */
- struct wps_context *wps;
-
- /**
- * ipv6 - Whether to enable IPv6 support in the RADIUS server
- */
- int ipv6;
-
- /**
- * start_time - Timestamp of server start
- */
- struct os_time start_time;
-
- /**
- * counters - Statistics counters for server operations
- *
- * These counters are the sum over all clients.
- */
- struct radius_server_counters counters;
-
- /**
- * get_eap_user - Callback for fetching EAP user information
- * @ctx: Context data from conf_ctx
- * @identity: User identity
- * @identity_len: identity buffer length in octets
- * @phase2: Whether this is for Phase 2 identity
- * @user: Data structure for filling in the user information
- * Returns: 0 on success, -1 on failure
- *
- * This is used to fetch information from user database. The callback
- * will fill in information about allowed EAP methods and the user
- * password. The password field will be an allocated copy of the
- * password data and RADIUS server will free it after use.
- */
- int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
- int phase2, struct eap_user *user);
-
- /**
- * eap_req_id_text - Optional data for EAP-Request/Identity
- *
- * This can be used to configure an optional, displayable message that
- * will be sent in EAP-Request/Identity. This string can contain an
- * ASCII-0 character (nul) to separate network infromation per RFC
- * 4284. The actual string length is explicit provided in
- * eap_req_id_text_len since nul character will not be used as a string
- * terminator.
- */
- char *eap_req_id_text;
-
- /**
- * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
- */
- size_t eap_req_id_text_len;
-
- /*
- * msg_ctx - Context data for wpa_msg() calls
- */
- void *msg_ctx;
-};
-
-
-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 void radius_server_session_remove_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);
- eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
- eap_server_sm_deinit(sess->eap);
- radius_msg_free(sess->last_msg);
- os_free(sess->last_from_addr);
- radius_msg_free(sess->last_reply);
- os_free(sess);
- data->num_sess--;
-}
-
-
-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 = 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;
-}
-
-
-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.msg_ctx = data->msg_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;
- eap_conf.pwd_group = data->pwd_group;
- 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;
-}
-
-
-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;
- 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;
-}
-
-
-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) {
- perror("sendto[RADIUS SRV]");
- ret = -1;
- }
-
- radius_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];
- 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 == radius_msg_get_hdr(msg)->identifier &&
- os_memcmp(sess->last_authenticator,
- radius_msg_get_hdr(msg)->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) {
- struct wpabuf *buf;
- buf = radius_msg_get_buf(sess->last_reply);
- res = sendto(data->auth_sock, wpabuf_head(buf),
- wpabuf_len(buf), 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)) {
- radius_msg_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) {
- struct wpabuf *buf;
- struct radius_hdr *hdr;
-
- RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
- if (wpa_debug_level <= MSG_MSGDUMP) {
- radius_msg_dump(reply);
- }
-
- switch (radius_msg_get_hdr(reply)->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;
- }
- buf = radius_msg_get_buf(reply);
- res = sendto(data->auth_sock, wpabuf_head(buf),
- wpabuf_len(buf), 0,
- (struct sockaddr *) from, fromlen);
- if (res < 0) {
- perror("sendto[RADIUS SRV]");
- }
- radius_msg_free(sess->last_reply);
- sess->last_reply = reply;
- sess->last_from_port = from_port;
- hdr = radius_msg_get_hdr(msg);
- sess->last_identifier = hdr->identifier;
- os_memcpy(sess->last_authenticator, 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;
-}
-
-
-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 (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
- RADIUS_DEBUG("Unexpected RADIUS code %d",
- radius_msg_get_hdr(msg)->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:
- radius_msg_free(msg);
- os_free(buf);
-}
-
-
-static int radius_server_disable_pmtu_discovery(int s)
-{
- int r = -1;
-#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
- /* Turn off Path MTU discovery on IPv4/UDP sockets. */
- int action = IP_PMTUDISC_DONT;
- r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
- sizeof(action));
- if (r == -1)
- wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
- "%s", strerror(errno));
-#endif
- return r;
-}
-
-
-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;
- }
-
- radius_server_disable_pmtu_discovery(s);
-
- os_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;
- }
-
- os_memset(&addr, 0, sizeof(addr));
- addr.sin6_family = AF_INET6;
- os_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);
- os_free(prev->shared_secret);
- os_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 = os_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);
- os_memset(addr6.s6_addr, 0, 10);
- addr6.s6_addr[10] = 0xff;
- addr6.s6_addr[11] = 0xff;
- os_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 = os_zalloc(sizeof(*entry));
- if (entry == NULL) {
- failed = 1;
- break;
- }
- entry->shared_secret = os_strdup(pos);
- if (entry->shared_secret == NULL) {
- failed = 1;
- os_free(entry);
- break;
- }
- entry->shared_secret_len = os_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;
-
- os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
- os_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;
- }
-
- os_free(buf);
- fclose(f);
-
- return clients;
-}
-
-
-/**
- * radius_server_init - Initialize RADIUS server
- * @conf: Configuration for the RADIUS server
- * Returns: Pointer to private RADIUS server context or %NULL on failure
- *
- * This initializes a RADIUS server instance and returns a context pointer that
- * will be used in other calls to the RADIUS server module. The server can be
- * deinitialize by calling radius_server_deinit().
- */
-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 = os_zalloc(sizeof(*data));
- if (data == NULL)
- return NULL;
-
- os_get_time(&data->start_time);
- data->conf_ctx = conf->conf_ctx;
- data->eap_sim_db_priv = conf->eap_sim_db_priv;
- data->ssl_ctx = conf->ssl_ctx;
- data->msg_ctx = conf->msg_ctx;
- data->ipv6 = conf->ipv6;
- if (conf->pac_opaque_encr_key) {
- data->pac_opaque_encr_key = os_malloc(16);
- os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
- 16);
- }
- if (conf->eap_fast_a_id) {
- data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
- if (data->eap_fast_a_id) {
- os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
- conf->eap_fast_a_id_len);
- data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
- }
- }
- if (conf->eap_fast_a_id_info)
- data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
- data->eap_fast_prov = conf->eap_fast_prov;
- data->pac_key_lifetime = conf->pac_key_lifetime;
- data->pac_key_refresh_time = conf->pac_key_refresh_time;
- data->get_eap_user = conf->get_eap_user;
- data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
- data->tnc = conf->tnc;
- data->wps = conf->wps;
- data->pwd_group = conf->pwd_group;
- if (conf->eap_req_id_text) {
- data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
- if (data->eap_req_id_text) {
- os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
- conf->eap_req_id_text_len);
- data->eap_req_id_text_len = conf->eap_req_id_text_len;
- }
- }
-
- 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;
-}
-
-
-/**
- * radius_server_deinit - Deinitialize RADIUS server
- * @data: RADIUS server context from radius_server_init()
- */
-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);
-
- os_free(data->pac_opaque_encr_key);
- os_free(data->eap_fast_a_id);
- os_free(data->eap_fast_a_id_info);
- os_free(data->eap_req_id_text);
- os_free(data);
-}
-
-
-/**
- * radius_server_get_mib - Get RADIUS server MIB information
- * @data: RADIUS server context from radius_server_init()
- * @buf: Buffer for returning the MIB data in text format
- * @buflen: buf length in octets
- * Returns: Number of octets written into buf
- */
-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 = os_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 = os_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) {
- os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
- os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
- }
-
- ret = os_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 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;
- struct radius_server_data *data = sess->server;
-
- return data->get_eap_user(data->conf_ctx, identity, identity_len,
- phase2, user);
-}
-
-
-static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
-{
- struct radius_session *sess = ctx;
- struct radius_server_data *data = sess->server;
- *len = data->eap_req_id_text_len;
- return data->eap_req_id_text;
-}
-
-
-static struct eapol_callbacks radius_server_eapol_cb =
-{
- .get_eap_user = radius_server_get_eap_user,
- .get_eap_req_id_text = radius_server_get_eap_req_id_text,
-};
-
-
-/**
- * radius_server_eap_pending_cb - Pending EAP data notification
- * @data: RADIUS server context from radius_server_init()
- * @ctx: Pending EAP context pointer
- *
- * This function is used to notify EAP server module that a pending operation
- * has been completed and processing of the EAP session can proceed.
- */
-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);
-}
projects / mech_eap.git / blobdiff