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hostapd/src/radius/radius_server.c
Jouni Malinen 6bb11c7a40 EAP-SIM/AKA server: Allow pseudonym/fast reauth to be disabled 
The new hostapd configuration option eap_sim_id can now be used to
disable use of pseudonym and/or fast reauthentication with EAP-SIM,
EAP-AKA, and EAP-AKA'.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2019-08-01 10:36:11 +03:00

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/*
* RADIUS authentication server
* Copyright (c) 2005-2009, 2011-2019, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include <net/if.h>
#ifdef CONFIG_SQLITE
#include <sqlite3.h>
#endif /* CONFIG_SQLITE */
#include "common.h"
#include "radius.h"
#include "eloop.h"
#include "eap_server/eap.h"
#include "ap/ap_config.h"
#include "crypto/tls.h"
#include "radius_server.h"
/**
* RADIUS_SESSION_TIMEOUT - Session timeout in seconds
*/
#define RADIUS_SESSION_TIMEOUT 60
/**
* RADIUS_SESSION_MAINTAIN - Completed session expiration timeout in seconds
*/
#define RADIUS_SESSION_MAINTAIN 5
/**
* RADIUS_MAX_SESSION - Maximum number of active sessions
*/
#define RADIUS_MAX_SESSION 1000
/**
* RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
*/
#define RADIUS_MAX_MSG_LEN 3000
static const 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;
u32 acct_requests;
u32 invalid_acct_requests;
u32 acct_responses;
u32 malformed_acct_requests;
u32 acct_bad_authenticators;
u32 unknown_acct_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;
char *username; /* from User-Name attribute */
char *nas_ip;
u8 mac_addr[ETH_ALEN]; /* from Calling-Station-Id attribute */
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];
unsigned int remediation:1;
unsigned int macacl:1;
unsigned int t_c_filtering:1;
struct hostapd_radius_attr *accept_attr;
u32 t_c_timestamp; /* Last read T&C timestamp from user DB */
};
/**
* 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;
u8 next_dac_identifier;
struct radius_msg *pending_dac_coa_req;
u8 pending_dac_coa_id;
u8 pending_dac_coa_addr[ETH_ALEN];
struct radius_msg *pending_dac_disconnect_req;
u8 pending_dac_disconnect_id;
u8 pending_dac_disconnect_addr[ETH_ALEN];
};
/**
* struct radius_server_data - Internal RADIUS server data
*/
struct radius_server_data {
/**
* auth_sock - Socket for RADIUS authentication messages
*/
int auth_sock;
/**
* acct_sock - Socket for RADIUS accounting messages
*/
int acct_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;
int eap_teap_auth;
int eap_teap_pac_no_inner;
/**
* 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;
int eap_sim_id;
/**
* 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;
/**
* server_id - Server identity
*/
const char *server_id;
/**
* erp - Whether EAP Re-authentication Protocol (ERP) is enabled
*
* This controls whether the authentication server derives ERP key
* hierarchy (rRK and rIK) from full EAP authentication and allows
* these keys to be used to perform ERP to derive rMSK instead of full
* EAP authentication to derive MSK.
*/
int erp;
const char *erp_domain;
struct dl_list erp_keys; /* struct eap_server_erp_key */
unsigned int tls_session_lifetime;
unsigned int tls_flags;
/**
* 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_reltime 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;
#ifdef CONFIG_RADIUS_TEST
char *dump_msk_file;
#endif /* CONFIG_RADIUS_TEST */
char *subscr_remediation_url;
u8 subscr_remediation_method;
char *hs20_sim_provisioning_url;
char *t_c_server_url;
#ifdef CONFIG_SQLITE
sqlite3 *db;
#endif /* CONFIG_SQLITE */
};
#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);
#ifdef CONFIG_SQLITE
#ifdef CONFIG_HS20
static int db_table_exists(sqlite3 *db, const char *name)
{
char cmd[128];
os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name);
return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK;
}
static int db_table_create_sim_provisioning(sqlite3 *db)
{
char *err = NULL;
const char *sql =
"CREATE TABLE sim_provisioning("
" mobile_identifier_hash TEXT PRIMARY KEY,"
" imsi TEXT,"
" mac_addr TEXT,"
" eap_method TEXT,"
" timestamp TEXT"
");";
RADIUS_DEBUG("Adding database table for SIM provisioning information");
if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) {
RADIUS_ERROR("SQLite error: %s", err);
sqlite3_free(err);
return -1;
}
return 0;
}
#endif /* CONFIG_HS20 */
#endif /* CONFIG_SQLITE */
void srv_log(struct radius_session *sess, const char *fmt, ...)
PRINTF_FORMAT(2, 3);
void srv_log(struct radius_session *sess, const char *fmt, ...)
{
va_list ap;
char *buf;
int buflen;
va_start(ap, fmt);
buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
va_end(ap);
buf = os_malloc(buflen);
if (buf == NULL)
return;
va_start(ap, fmt);
vsnprintf(buf, buflen, fmt, ap);
va_end(ap);
RADIUS_DEBUG("[0x%x %s] %s", sess->sess_id, sess->nas_ip, buf);
#ifdef CONFIG_SQLITE
if (sess->server->db) {
char *sql;
sql = sqlite3_mprintf("INSERT INTO authlog"
"(timestamp,session,nas_ip,username,note)"
" VALUES ("
"strftime('%%Y-%%m-%%d %%H:%%M:%%f',"
"'now'),%u,%Q,%Q,%Q)",
sess->sess_id, sess->nas_ip,
sess->username, buf);
if (sql) {
if (sqlite3_exec(sess->server->db, sql, NULL, NULL,
NULL) != SQLITE_OK) {
RADIUS_ERROR("Failed to add authlog entry into sqlite database: %s",
sqlite3_errmsg(sess->server->db));
}
sqlite3_free(sql);
}
}
#endif /* CONFIG_SQLITE */
os_free(buf);
}
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->username);
os_free(sess->nas_ip);
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;
}
#ifdef CONFIG_TESTING_OPTIONS
static void radius_server_testing_options_tls(struct radius_session *sess,
const char *tls,
struct eap_config *eap_conf)
{
int test = atoi(tls);
switch (test) {
case 1:
srv_log(sess, "TLS test - break VerifyData");
eap_conf->tls_test_flags = TLS_BREAK_VERIFY_DATA;
break;
case 2:
srv_log(sess, "TLS test - break ServerKeyExchange ServerParams hash");
eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_HASH;
break;
case 3:
srv_log(sess, "TLS test - break ServerKeyExchange ServerParams Signature");
eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_SIGNATURE;
break;
case 4:
srv_log(sess, "TLS test - RSA-DHE using a short 511-bit prime");
eap_conf->tls_test_flags = TLS_DHE_PRIME_511B;
break;
case 5:
srv_log(sess, "TLS test - RSA-DHE using a short 767-bit prime");
eap_conf->tls_test_flags = TLS_DHE_PRIME_767B;
break;
case 6:
srv_log(sess, "TLS test - RSA-DHE using a bogus 15 \"prime\"");
eap_conf->tls_test_flags = TLS_DHE_PRIME_15;
break;
case 7:
srv_log(sess, "TLS test - RSA-DHE using a short 58-bit prime in long container");
eap_conf->tls_test_flags = TLS_DHE_PRIME_58B;
break;
case 8:
srv_log(sess, "TLS test - RSA-DHE using a non-prime");
eap_conf->tls_test_flags = TLS_DHE_NON_PRIME;
break;
default:
srv_log(sess, "Unrecognized TLS test");
break;
}
}
#endif /* CONFIG_TESTING_OPTIONS */
static void radius_server_testing_options(struct radius_session *sess,
struct eap_config *eap_conf)
{
#ifdef CONFIG_TESTING_OPTIONS
const char *pos;
pos = os_strstr(sess->username, "@test-");
if (pos == NULL)
return;
pos += 6;
if (os_strncmp(pos, "tls-", 4) == 0)
radius_server_testing_options_tls(sess, pos + 4, eap_conf);
else
srv_log(sess, "Unrecognized test: %s", pos);
#endif /* CONFIG_TESTING_OPTIONS */
}
#ifdef CONFIG_ERP
static struct eap_server_erp_key *
radius_server_erp_find_key(struct radius_server_data *data, const char *keyname)
{
struct eap_server_erp_key *erp;
dl_list_for_each(erp, &data->erp_keys, struct eap_server_erp_key,
list) {
if (os_strcmp(erp->keyname_nai, keyname) == 0)
return erp;
}
return NULL;
}
#endif /* CONFIG_ERP */
static struct radius_session *
radius_server_get_new_session(struct radius_server_data *data,
struct radius_client *client,
struct radius_msg *msg, const char *from_addr)
{
u8 *user, *id;
size_t user_len, id_len;
int res;
struct radius_session *sess;
struct eap_config eap_conf;
struct eap_user *tmp;
RADIUS_DEBUG("Creating a new session");
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &user,
&user_len, NULL) < 0) {
RADIUS_DEBUG("Could not get User-Name");
return NULL;
}
RADIUS_DUMP_ASCII("User-Name", user, user_len);
tmp = os_zalloc(sizeof(*tmp));
if (!tmp)
return NULL;
res = data->get_eap_user(data->conf_ctx, user, user_len, 0, tmp);
#ifdef CONFIG_ERP
if (res != 0 && data->erp) {
char *username;
username = os_zalloc(user_len + 1);
if (username) {
os_memcpy(username, user, user_len);
if (radius_server_erp_find_key(data, username))
res = 0;
os_free(username);
}
}
#endif /* CONFIG_ERP */
if (res != 0) {
RADIUS_DEBUG("User-Name not found from user database");
eap_user_free(tmp);
return NULL;
}
RADIUS_DEBUG("Matching user entry found");
sess = radius_server_new_session(data, client);
if (sess == NULL) {
RADIUS_DEBUG("Failed to create a new session");
eap_user_free(tmp);
return NULL;
}
sess->accept_attr = tmp->accept_attr;
sess->macacl = tmp->macacl;
eap_user_free(tmp);
sess->username = os_malloc(user_len * 4 + 1);
if (sess->username == NULL) {
radius_server_session_remove(data, sess);
return NULL;
}
printf_encode(sess->username, user_len * 4 + 1, user, user_len);
sess->nas_ip = os_strdup(from_addr);
if (sess->nas_ip == NULL) {
radius_server_session_remove(data, sess);
return NULL;
}
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CALLING_STATION_ID, &id,
&id_len, NULL) == 0) {
char buf[3 * ETH_ALEN];
os_memset(buf, 0, sizeof(buf));
if (id_len >= sizeof(buf))
id_len = sizeof(buf) - 1;
os_memcpy(buf, id, id_len);
if (hwaddr_aton2(buf, sess->mac_addr) < 0)
os_memset(sess->mac_addr, 0, ETH_ALEN);
else
RADIUS_DEBUG("Calling-Station-Id: " MACSTR,
MAC2STR(sess->mac_addr));
}
srv_log(sess, "New session created");
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_teap_auth = data->eap_teap_auth;
eap_conf.eap_teap_pac_no_inner = data->eap_teap_pac_no_inner;
eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
eap_conf.eap_sim_id = data->eap_sim_id;
eap_conf.tnc = data->tnc;
eap_conf.wps = data->wps;
eap_conf.pwd_group = data->pwd_group;
eap_conf.server_id = (const u8 *) data->server_id;
eap_conf.server_id_len = os_strlen(data->server_id);
eap_conf.erp = data->erp;
eap_conf.tls_session_lifetime = data->tls_session_lifetime;
eap_conf.tls_flags = data->tls_flags;
radius_server_testing_options(sess, &eap_conf);
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_remove(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;
}
#ifdef CONFIG_HS20
static void radius_srv_hs20_t_c_pending(struct radius_session *sess)
{
#ifdef CONFIG_SQLITE
char *sql;
char addr[3 * ETH_ALEN], *id_str;
const u8 *id;
size_t id_len;
if (!sess->server->db || !sess->eap ||
is_zero_ether_addr(sess->mac_addr))
return;
os_snprintf(addr, sizeof(addr), MACSTR, MAC2STR(sess->mac_addr));
id = eap_get_identity(sess->eap, &id_len);
if (!id)
return;
id_str = os_malloc(id_len + 1);
if (!id_str)
return;
os_memcpy(id_str, id, id_len);
id_str[id_len] = '\0';
sql = sqlite3_mprintf("INSERT OR REPLACE INTO pending_tc (mac_addr,identity) VALUES (%Q,%Q)",
addr, id_str);
os_free(id_str);
if (!sql)
return;
if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) !=
SQLITE_OK) {
RADIUS_ERROR("Failed to add pending_tc entry into sqlite database: %s",
sqlite3_errmsg(sess->server->db));
}
sqlite3_free(sql);
#endif /* CONFIG_SQLITE */
}
#endif /* CONFIG_HS20 */
static void radius_server_add_session(struct radius_session *sess)
{
#ifdef CONFIG_SQLITE
char *sql;
char addr_txt[ETH_ALEN * 3];
struct os_time now;
if (!sess->server->db)
return;
os_snprintf(addr_txt, sizeof(addr_txt), MACSTR,
MAC2STR(sess->mac_addr));
os_get_time(&now);
sql = sqlite3_mprintf("INSERT OR REPLACE INTO current_sessions(mac_addr,identity,start_time,nas,hs20_t_c_filtering) VALUES (%Q,%Q,%d,%Q,%u)",
addr_txt, sess->username, now.sec,
sess->nas_ip, sess->t_c_filtering);
if (sql) {
if (sqlite3_exec(sess->server->db, sql, NULL, NULL,
NULL) != SQLITE_OK) {
RADIUS_ERROR("Failed to add current_sessions entry into sqlite database: %s",
sqlite3_errmsg(sess->server->db));
}
sqlite3_free(sql);
}
#endif /* CONFIG_SQLITE */
}
static void db_update_last_msk(struct radius_session *sess, const char *msk)
{
#ifdef CONFIG_RADIUS_TEST
#ifdef CONFIG_SQLITE
char *sql = NULL;
char *id_str = NULL;
const u8 *id;
size_t id_len;
const char *serial_num;
if (!sess->server->db)
return;
serial_num = eap_get_serial_num(sess->eap);
if (serial_num) {
id_len = 5 + os_strlen(serial_num) + 1;
id_str = os_malloc(id_len);
if (!id_str)
return;
os_snprintf(id_str, id_len, "cert-%s", serial_num);
} else {
id = eap_get_identity(sess->eap, &id_len);
if (!id)
return;
id_str = os_malloc(id_len + 1);
if (!id_str)
return;
os_memcpy(id_str, id, id_len);
id_str[id_len] = '\0';
}
sql = sqlite3_mprintf("UPDATE users SET last_msk=%Q WHERE identity=%Q",
msk, id_str);
os_free(id_str);
if (!sql)
return;
if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) !=
SQLITE_OK) {
RADIUS_DEBUG("Failed to update last_msk: %s",
sqlite3_errmsg(sess->server->db));
}
sqlite3_free(sql);
#endif /* CONFIG_SQLITE */
#endif /* CONFIG_RADIUS_TEST */
}
#ifdef CONFIG_HS20
static int radius_server_is_sim_method(struct radius_session *sess)
{
const char *name;
name = eap_get_method(sess->eap);
return name &&
(os_strcmp(name, "SIM") == 0 ||
os_strcmp(name, "AKA") == 0 ||
os_strcmp(name, "AKA'") == 0);
}
static int radius_server_hs20_missing_sim_pps(struct radius_msg *request)
{
u8 *buf, *pos, *end, type, sublen;
size_t len;
buf = NULL;
for (;;) {
if (radius_msg_get_attr_ptr(request,
RADIUS_ATTR_VENDOR_SPECIFIC,
&buf, &len, buf) < 0)
return 0;
if (len < 6)
continue;
pos = buf;
end = buf + len;
if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
continue;
pos += 4;
type = *pos++;
sublen = *pos++;
if (sublen < 2)
continue; /* invalid length */
sublen -= 2; /* skip header */
if (pos + sublen > end)
continue; /* invalid WFA VSA */
if (type != RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION)
continue;
RADIUS_DUMP("HS2.0 mobile device version", pos, sublen);
if (sublen < 1 + 2)
continue;
if (pos[0] == 0)
continue; /* Release 1 STA does not support provisioning
*/
/* UpdateIdentifier 0 indicates no PPS MO */
return WPA_GET_BE16(pos + 1) == 0;
}
}
#define HS20_MOBILE_ID_HASH_LEN 16
static int radius_server_sim_provisioning_session(struct radius_session *sess,
const u8 *hash)
{
#ifdef CONFIG_SQLITE
char *sql;
char addr_txt[ETH_ALEN * 3];
char hash_txt[2 * HS20_MOBILE_ID_HASH_LEN + 1];
struct os_time now;
int res;
const char *imsi, *eap_method;
if (!sess->server->db ||
(!db_table_exists(sess->server->db, "sim_provisioning") &&
db_table_create_sim_provisioning(sess->server->db) < 0))
return -1;
imsi = eap_get_imsi(sess->eap);
if (!imsi)
return -1;
eap_method = eap_get_method(sess->eap);
if (!eap_method)
return -1;
os_snprintf(addr_txt, sizeof(addr_txt), MACSTR,
MAC2STR(sess->mac_addr));
wpa_snprintf_hex(hash_txt, sizeof(hash_txt), hash,
HS20_MOBILE_ID_HASH_LEN);
os_get_time(&now);
sql = sqlite3_mprintf("INSERT INTO sim_provisioning(mobile_identifier_hash,imsi,mac_addr,eap_method,timestamp) VALUES (%Q,%Q,%Q,%Q,%u)",
hash_txt, imsi, addr_txt, eap_method, now.sec);
if (!sql)
return -1;
if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) !=
SQLITE_OK) {
RADIUS_ERROR("Failed to add SIM provisioning entry into sqlite database: %s",
sqlite3_errmsg(sess->server->db));
res = -1;
} else {
res = 0;
}
sqlite3_free(sql);
return res;
#endif /* CONFIG_SQLITE */
return -1;
}
#endif /* CONFIG_HS20 */
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);
u16 reason = WLAN_REASON_IEEE_802_1X_AUTH_FAILED;
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
char buf[2 * 64 + 1];
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';
if (data->dump_msk_file) {
FILE *f;
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);
}
}
db_update_last_msk(sess, buf);
#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 (sess->eap_if->eapSessionId &&
!radius_msg_add_attr(msg, RADIUS_ATTR_EAP_KEY_NAME,
sess->eap_if->eapSessionId,
sess->eap_if->eapSessionIdLen)) {
RADIUS_DEBUG("Failed to add EAP-Key-Name attribute");
}
}
#ifdef CONFIG_HS20
if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation &&
data->subscr_remediation_url) {
u8 *buf;
size_t url_len = os_strlen(data->subscr_remediation_url);
buf = os_malloc(1 + url_len);
if (buf == NULL) {
radius_msg_free(msg);
return NULL;
}
buf[0] = data->subscr_remediation_method;
os_memcpy(&buf[1], data->subscr_remediation_url, url_len);
if (!radius_msg_add_wfa(
msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION,
buf, 1 + url_len)) {
RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem");
}
os_free(buf);
} else if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation) {
u8 buf[1];
if (!radius_msg_add_wfa(
msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION,
buf, 0)) {
RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem");
}
} else if (code == RADIUS_CODE_ACCESS_ACCEPT &&
data->hs20_sim_provisioning_url &&
radius_server_is_sim_method(sess) &&
radius_server_hs20_missing_sim_pps(request)) {
u8 *buf, *pos, hash[HS20_MOBILE_ID_HASH_LEN];
size_t prefix_len, url_len;
RADIUS_DEBUG("Device needs HS 2.0 SIM provisioning");
if (os_get_random(hash, HS20_MOBILE_ID_HASH_LEN) < 0) {
radius_msg_free(msg);
return NULL;
}
RADIUS_DUMP("hotspot2dot0-mobile-identifier-hash",
hash, HS20_MOBILE_ID_HASH_LEN);
if (radius_server_sim_provisioning_session(sess, hash) < 0) {
radius_msg_free(msg);
return NULL;
}
prefix_len = os_strlen(data->hs20_sim_provisioning_url);
url_len = prefix_len + 2 * HS20_MOBILE_ID_HASH_LEN;
buf = os_malloc(1 + url_len + 1);
if (!buf) {
radius_msg_free(msg);
return NULL;
}
pos = buf;
*pos++ = data->subscr_remediation_method;
os_memcpy(pos, data->hs20_sim_provisioning_url, prefix_len);
pos += prefix_len;
wpa_snprintf_hex((char *) pos, 2 * HS20_MOBILE_ID_HASH_LEN + 1,
hash, HS20_MOBILE_ID_HASH_LEN);
RADIUS_DEBUG("HS 2.0 subscription remediation URL: %s",
(char *) &buf[1]);
if (!radius_msg_add_wfa(
msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION,
buf, 1 + url_len)) {
RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem");
}
os_free(buf);
}
if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->t_c_filtering) {
u8 buf[4] = { 0x01, 0x00, 0x00, 0x00 }; /* E=1 */
const char *url = data->t_c_server_url, *pos;
char *url2, *end2, *pos2;
size_t url_len;
if (!radius_msg_add_wfa(
msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING,
buf, sizeof(buf))) {
RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering");
radius_msg_free(msg);
return NULL;
}
if (!url) {
RADIUS_DEBUG("No t_c_server_url configured");
radius_msg_free(msg);
return NULL;
}
pos = os_strstr(url, "@1@");
if (!pos) {
RADIUS_DEBUG("No @1@ macro in t_c_server_url");
radius_msg_free(msg);
return NULL;
}
url_len = os_strlen(url) + ETH_ALEN * 3 - 1 - 3;
url2 = os_malloc(url_len + 1);
if (!url2) {
RADIUS_DEBUG("Failed to allocate room for T&C Server URL");
os_free(url2);
radius_msg_free(msg);
return NULL;
}
pos2 = url2;
end2 = url2 + url_len + 1;
os_memcpy(pos2, url, pos - url);
pos2 += pos - url;
os_snprintf(pos2, end2 - pos2, MACSTR, MAC2STR(sess->mac_addr));
pos2 += ETH_ALEN * 3 - 1;
os_memcpy(pos2, pos + 3, os_strlen(pos + 3));
if (!radius_msg_add_wfa(msg,
RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL,
(const u8 *) url2, url_len)) {
RADIUS_DEBUG("Failed to add WFA-HS20-T-C-URL");
os_free(url2);
radius_msg_free(msg);
return NULL;
}
os_free(url2);
radius_srv_hs20_t_c_pending(sess);
}
#endif /* CONFIG_HS20 */
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 (code == RADIUS_CODE_ACCESS_ACCEPT) {
struct hostapd_radius_attr *attr;
for (attr = sess->accept_attr; attr; attr = attr->next) {
if (!radius_msg_add_attr(msg, attr->type,
wpabuf_head(attr->val),
wpabuf_len(attr->val))) {
wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
radius_msg_free(msg);
return NULL;
}
}
}
if (code == RADIUS_CODE_ACCESS_REJECT) {
if (radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE,
reason) < 0) {
RADIUS_DEBUG("Failed to add WLAN-Reason-Code attribute");
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");
}
if (code == RADIUS_CODE_ACCESS_ACCEPT)
radius_server_add_session(sess);
return msg;
}
static struct radius_msg *
radius_server_macacl(struct radius_server_data *data,
struct radius_client *client,
struct radius_session *sess,
struct radius_msg *request)
{
struct radius_msg *msg;
int code;
struct radius_hdr *hdr = radius_msg_get_hdr(request);
u8 *pw;
size_t pw_len;
code = RADIUS_CODE_ACCESS_ACCEPT;
if (radius_msg_get_attr_ptr(request, RADIUS_ATTR_USER_PASSWORD, &pw,
&pw_len, NULL) < 0) {
RADIUS_DEBUG("Could not get User-Password");
code = RADIUS_CODE_ACCESS_REJECT;
} else {
int res;
struct eap_user tmp;
os_memset(&tmp, 0, sizeof(tmp));
res = data->get_eap_user(data->conf_ctx, (u8 *) sess->username,
os_strlen(sess->username), 0, &tmp);
if (res || !tmp.macacl || tmp.password == NULL) {
RADIUS_DEBUG("No MAC ACL user entry");
bin_clear_free(tmp.password, tmp.password_len);
code = RADIUS_CODE_ACCESS_REJECT;
} else {
u8 buf[128];
res = radius_user_password_hide(
request, tmp.password, tmp.password_len,
(u8 *) client->shared_secret,
client->shared_secret_len,
buf, sizeof(buf));
bin_clear_free(tmp.password, tmp.password_len);
if (res < 0 || pw_len != (size_t) res ||
os_memcmp_const(pw, buf, res) != 0) {
RADIUS_DEBUG("Incorrect User-Password");
code = RADIUS_CODE_ACCESS_REJECT;
}
}
}
msg = radius_msg_new(code, hdr->identifier);
if (msg == NULL) {
RADIUS_DEBUG("Failed to allocate reply message");
return NULL;
}
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 (code == RADIUS_CODE_ACCESS_ACCEPT) {
struct hostapd_radius_attr *attr;
for (attr = sess->accept_attr; attr; attr = attr->next) {
if (!radius_msg_add_attr(msg, attr->type,
wpabuf_head(attr->val),
wpabuf_len(attr->val))) {
wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
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) {
wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno));
ret = -1;
}
radius_msg_free(msg);
return ret;
}
static void radius_server_hs20_t_c_check(struct radius_session *sess,
struct radius_msg *msg)
{
#ifdef CONFIG_HS20
u8 *buf, *pos, *end, type, sublen, *timestamp = NULL;
size_t len;
buf = NULL;
for (;;) {
if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
&buf, &len, buf) < 0)
break;
if (len < 6)
continue;
pos = buf;
end = buf + len;
if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
continue;
pos += 4;
type = *pos++;
sublen = *pos++;
if (sublen < 2)
continue; /* invalid length */
sublen -= 2; /* skip header */
if (pos + sublen > end)
continue; /* invalid WFA VSA */
if (type == RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP && len >= 4) {
timestamp = pos;
break;
}
}
if (!timestamp)
return;
RADIUS_DEBUG("HS20-Timestamp: %u", WPA_GET_BE32(timestamp));
if (sess->t_c_timestamp != WPA_GET_BE32(timestamp)) {
RADIUS_DEBUG("Last read T&C timestamp does not match HS20-Timestamp --> require filtering");
sess->t_c_filtering = 1;
}
#endif /* CONFIG_HS20 */
}
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)
{
struct wpabuf *eap = NULL;
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,
from_addr);
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) {
wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
strerror(errno));
}
return 0;
}
RADIUS_DEBUG("No previous reply available for duplicate "
"message");
return -1;
}
eap = radius_msg_get_eap(msg);
if (eap == NULL && sess->macacl) {
reply = radius_server_macacl(data, client, sess, msg);
if (reply == NULL)
return -1;
goto send_reply;
}
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", wpabuf_head(eap), wpabuf_len(eap));
/* 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 = eap;
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;
if (sess->eap_if->eapFail) {
srv_log(sess, "EAP authentication failed");
db_update_last_msk(sess, "FAIL");
} else if (sess->eap_if->eapSuccess) {
srv_log(sess, "EAP authentication succeeded");
}
if (sess->eap_if->eapSuccess)
radius_server_hs20_t_c_check(sess, msg);
reply = radius_server_encapsulate_eap(data, client, sess, msg);
send_reply:
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:
srv_log(sess, "Sending Access-Accept");
data->counters.access_accepts++;
client->counters.access_accepts++;
break;
case RADIUS_CODE_ACCESS_REJECT:
srv_log(sess, "Sending 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) {
wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
strerror(errno));
}
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(RADIUS_SESSION_MAINTAIN, 0,
radius_server_session_remove_timeout,
data, sess);
}
return 0;
}
static void
radius_server_receive_disconnect_resp(struct radius_server_data *data,
struct radius_client *client,
struct radius_msg *msg, int ack)
{
struct radius_hdr *hdr;
if (!client->pending_dac_disconnect_req) {
RADIUS_DEBUG("Ignore unexpected Disconnect response");
radius_msg_free(msg);
return;
}
hdr = radius_msg_get_hdr(msg);
if (hdr->identifier != client->pending_dac_disconnect_id) {
RADIUS_DEBUG("Ignore unexpected Disconnect response with unexpected identifier %u (expected %u)",
hdr->identifier,
client->pending_dac_disconnect_id);
radius_msg_free(msg);
return;
}
if (radius_msg_verify(msg, (const u8 *) client->shared_secret,
client->shared_secret_len,
client->pending_dac_disconnect_req, 0)) {
RADIUS_DEBUG("Ignore Disconnect response with invalid authenticator");
radius_msg_free(msg);
return;
}
RADIUS_DEBUG("Disconnect-%s received for " MACSTR,
ack ? "ACK" : "NAK",
MAC2STR(client->pending_dac_disconnect_addr));
radius_msg_free(msg);
radius_msg_free(client->pending_dac_disconnect_req);
client->pending_dac_disconnect_req = NULL;
}
static void radius_server_receive_coa_resp(struct radius_server_data *data,
struct radius_client *client,
struct radius_msg *msg, int ack)
{
struct radius_hdr *hdr;
#ifdef CONFIG_SQLITE
char addrtxt[3 * ETH_ALEN];
char *sql;
int res;
#endif /* CONFIG_SQLITE */
if (!client->pending_dac_coa_req) {
RADIUS_DEBUG("Ignore unexpected CoA response");
radius_msg_free(msg);
return;
}
hdr = radius_msg_get_hdr(msg);
if (hdr->identifier != client->pending_dac_coa_id) {
RADIUS_DEBUG("Ignore unexpected CoA response with unexpected identifier %u (expected %u)",
hdr->identifier,
client->pending_dac_coa_id);
radius_msg_free(msg);
return;
}
if (radius_msg_verify(msg, (const u8 *) client->shared_secret,
client->shared_secret_len,
client->pending_dac_coa_req, 0)) {
RADIUS_DEBUG("Ignore CoA response with invalid authenticator");
radius_msg_free(msg);
return;
}
RADIUS_DEBUG("CoA-%s received for " MACSTR,
ack ? "ACK" : "NAK",
MAC2STR(client->pending_dac_coa_addr));
radius_msg_free(msg);
radius_msg_free(client->pending_dac_coa_req);
client->pending_dac_coa_req = NULL;
#ifdef CONFIG_SQLITE
if (!data->db)
return;
os_snprintf(addrtxt, sizeof(addrtxt), MACSTR,
MAC2STR(client->pending_dac_coa_addr));
if (ack) {
sql = sqlite3_mprintf("UPDATE current_sessions SET hs20_t_c_filtering=0, waiting_coa_ack=0, coa_ack_received=1 WHERE mac_addr=%Q",
addrtxt);
} else {
sql = sqlite3_mprintf("UPDATE current_sessions SET waiting_coa_ack=0 WHERE mac_addr=%Q",
addrtxt);
}
if (!sql)
return;
res = sqlite3_exec(data->db, sql, NULL, NULL, NULL);
sqlite3_free(sql);
if (res != SQLITE_OK) {
RADIUS_ERROR("Failed to update current_sessions entry: %s",
sqlite3_errmsg(data->db));
return;
}
#endif /* CONFIG_SQLITE */
}
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) {
wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s",
strerror(errno));
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_DISCONNECT_ACK) {
radius_server_receive_disconnect_resp(data, client, msg, 1);
return;
}
if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_NAK) {
radius_server_receive_disconnect_resp(data, client, msg, 0);
return;
}
if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_ACK) {
radius_server_receive_coa_resp(data, client, msg, 1);
return;
}
if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_NAK) {
radius_server_receive_coa_resp(data, client, msg, 0);
return;
}
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 void radius_server_receive_acct(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, res;
struct radius_client *client = NULL;
struct radius_msg *msg = NULL, *resp = NULL;
char abuf[50];
int from_port = 0;
struct radius_hdr *hdr;
struct wpabuf *rbuf;
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) {
wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s",
strerror(errno));
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_acct_requests++;
goto fail;
}
msg = radius_msg_parse(buf, len);
if (msg == NULL) {
RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
data->counters.malformed_acct_requests++;
client->counters.malformed_acct_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_ACCOUNTING_REQUEST) {
RADIUS_DEBUG("Unexpected RADIUS code %d",
radius_msg_get_hdr(msg)->code);
data->counters.unknown_acct_types++;
client->counters.unknown_acct_types++;
goto fail;
}
data->counters.acct_requests++;
client->counters.acct_requests++;
if (radius_msg_verify_acct_req(msg, (u8 *) client->shared_secret,
client->shared_secret_len)) {
RADIUS_DEBUG("Invalid Authenticator from %s", abuf);
data->counters.acct_bad_authenticators++;
client->counters.acct_bad_authenticators++;
goto fail;
}
/* TODO: Write accounting information to a file or database */
hdr = radius_msg_get_hdr(msg);
resp = radius_msg_new(RADIUS_CODE_ACCOUNTING_RESPONSE, hdr->identifier);
if (resp == NULL)
goto fail;
radius_msg_finish_acct_resp(resp, (u8 *) client->shared_secret,
client->shared_secret_len,
hdr->authenticator);
RADIUS_DEBUG("Reply to %s:%d", abuf, from_port);
if (wpa_debug_level <= MSG_MSGDUMP) {
radius_msg_dump(resp);
}
rbuf = radius_msg_get_buf(resp);
data->counters.acct_responses++;
client->counters.acct_responses++;
res = sendto(data->acct_sock, wpabuf_head(rbuf), wpabuf_len(rbuf), 0,
(struct sockaddr *) &from.ss, fromlen);
if (res < 0) {
wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
strerror(errno));
}
fail:
radius_msg_free(resp);
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) {
wpa_printf(MSG_INFO, "RADIUS: socket: %s", strerror(errno));
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) {
wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno));
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) {
wpa_printf(MSG_INFO, "RADIUS: socket[IPv6]: %s",
strerror(errno));
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) {
wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno));
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);
radius_msg_free(prev->pending_dac_coa_req);
radius_msg_free(prev->pending_dac_disconnect_req);
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);
if (!ipv6) {
entry->addr.s_addr = addr.s_addr;
val = 0;
for (i = 0; i < mask; i++)
val |= 1U << (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) {
wpa_printf(MSG_ERROR, "RADIUS server compiled without IPv6 support");
return NULL;
}
#endif /* CONFIG_IPV6 */
data = os_zalloc(sizeof(*data));
if (data == NULL)
return NULL;
data->auth_sock = -1;
data->acct_sock = -1;
dl_list_init(&data->erp_keys);
os_get_reltime(&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);
if (data->pac_opaque_encr_key) {
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->eap_teap_auth = conf->eap_teap_auth;
data->eap_teap_pac_no_inner = conf->eap_teap_pac_no_inner;
data->get_eap_user = conf->get_eap_user;
data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
data->eap_sim_id = conf->eap_sim_id;
data->tnc = conf->tnc;
data->wps = conf->wps;
data->pwd_group = conf->pwd_group;
data->server_id = conf->server_id;
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->erp = conf->erp;
data->erp_domain = conf->erp_domain;
data->tls_session_lifetime = conf->tls_session_lifetime;
data->tls_flags = conf->tls_flags;
if (conf->subscr_remediation_url) {
data->subscr_remediation_url =
os_strdup(conf->subscr_remediation_url);
}
data->subscr_remediation_method = conf->subscr_remediation_method;
if (conf->hs20_sim_provisioning_url)
data->hs20_sim_provisioning_url =
os_strdup(conf->hs20_sim_provisioning_url);
if (conf->t_c_server_url)
data->t_c_server_url = os_strdup(conf->t_c_server_url);
#ifdef CONFIG_SQLITE
if (conf->sqlite_file) {
if (sqlite3_open(conf->sqlite_file, &data->db)) {
RADIUS_ERROR("Could not open SQLite file '%s'",
conf->sqlite_file);
radius_server_deinit(data);
return NULL;
}
}
#endif /* CONFIG_SQLITE */
#ifdef CONFIG_RADIUS_TEST
if (conf->dump_msk_file)
data->dump_msk_file = os_strdup(conf->dump_msk_file);
#endif /* CONFIG_RADIUS_TEST */
data->clients = radius_server_read_clients(conf->client_file,
conf->ipv6);
if (data->clients == NULL) {
wpa_printf(MSG_ERROR, "No RADIUS clients configured");
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) {
wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS authentication server");
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;
}
if (conf->acct_port) {
#ifdef CONFIG_IPV6
if (conf->ipv6)
data->acct_sock = radius_server_open_socket6(
conf->acct_port);
else
#endif /* CONFIG_IPV6 */
data->acct_sock = radius_server_open_socket(conf->acct_port);
if (data->acct_sock < 0) {
wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS accounting server");
radius_server_deinit(data);
return NULL;
}
if (eloop_register_read_sock(data->acct_sock,
radius_server_receive_acct,
data, NULL)) {
radius_server_deinit(data);
return NULL;
}
} else {
data->acct_sock = -1;
}
return data;
}
/**
* radius_server_erp_flush - Flush all ERP keys
* @data: RADIUS server context from radius_server_init()
*/
void radius_server_erp_flush(struct radius_server_data *data)
{
struct eap_server_erp_key *erp;
if (data == NULL)
return;
while ((erp = dl_list_first(&data->erp_keys, struct eap_server_erp_key,
list)) != NULL) {
dl_list_del(&erp->list);
bin_clear_free(erp, sizeof(*erp));
}
}
/**
* 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);
}
if (data->acct_sock >= 0) {
eloop_unregister_read_sock(data->acct_sock);
close(data->acct_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);
#ifdef CONFIG_RADIUS_TEST
os_free(data->dump_msk_file);
#endif /* CONFIG_RADIUS_TEST */
os_free(data->subscr_remediation_url);
os_free(data->hs20_sim_provisioning_url);
os_free(data->t_c_server_url);
#ifdef CONFIG_SQLITE
if (data->db)
sqlite3_close(data->db);
#endif /* CONFIG_SQLITE */
radius_server_erp_flush(data);
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_reltime 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_reltime(&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 (os_snprintf_error(end - pos, ret)) {
*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"
"radiusAccServTotalRequests=%u\n"
"radiusAccServTotalInvalidRequests=%u\n"
"radiusAccServTotalResponses=%u\n"
"radiusAccServTotalMalformedRequests=%u\n"
"radiusAccServTotalBadAuthenticators=%u\n"
"radiusAccServTotalUnknownTypes=%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,
data->counters.acct_requests,
data->counters.invalid_acct_requests,
data->counters.acct_responses,
data->counters.malformed_acct_requests,
data->counters.acct_bad_authenticators,
data->counters.unknown_acct_types);
if (os_snprintf_error(end - pos, ret)) {
*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, mbuf,
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"
"radiusAccServTotalRequests=%u\n"
"radiusAccServTotalInvalidRequests=%u\n"
"radiusAccServTotalResponses=%u\n"
"radiusAccServTotalMalformedRequests=%u\n"
"radiusAccServTotalBadAuthenticators=%u\n"
"radiusAccServTotalUnknownTypes=%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,
cli->counters.acct_requests,
cli->counters.invalid_acct_requests,
cli->counters.acct_responses,
cli->counters.malformed_acct_requests,
cli->counters.acct_bad_authenticators,
cli->counters.unknown_acct_types);
if (os_snprintf_error(end - pos, ret)) {
*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;
int ret;
ret = data->get_eap_user(data->conf_ctx, identity, identity_len,
phase2, user);
if (ret == 0 && user) {
sess->accept_attr = user->accept_attr;
sess->remediation = user->remediation;
sess->macacl = user->macacl;
sess->t_c_timestamp = user->t_c_timestamp;
}
if (ret) {
RADIUS_DEBUG("%s: User-Name not found from user database",
__func__);
}
return ret;
}
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 void radius_server_log_msg(void *ctx, const char *msg)
{
struct radius_session *sess = ctx;
srv_log(sess, "EAP: %s", msg);
}
#ifdef CONFIG_ERP
static const char * radius_server_get_erp_domain(void *ctx)
{
struct radius_session *sess = ctx;
struct radius_server_data *data = sess->server;
return data->erp_domain;
}
static struct eap_server_erp_key *
radius_server_erp_get_key(void *ctx, const char *keyname)
{
struct radius_session *sess = ctx;
struct radius_server_data *data = sess->server;
return radius_server_erp_find_key(data, keyname);
}
static int radius_server_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
{
struct radius_session *sess = ctx;
struct radius_server_data *data = sess->server;
dl_list_add(&data->erp_keys, &erp->list);
return 0;
}
#endif /* CONFIG_ERP */
static const 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,
.log_msg = radius_server_log_msg,
#ifdef CONFIG_ERP
.get_erp_send_reauth_start = NULL,
.get_erp_domain = radius_server_get_erp_domain,
.erp_get_key = radius_server_erp_get_key,
.erp_add_key = radius_server_erp_add_key,
#endif /* CONFIG_ERP */
};
/**
* 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 == 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);
}
#ifdef CONFIG_SQLITE
struct db_session_fields {
char *identity;
char *nas;
int hs20_t_c_filtering;
int waiting_coa_ack;
int coa_ack_received;
};
static int get_db_session_fields(void *ctx, int argc, char *argv[], char *col[])
{
struct db_session_fields *fields = ctx;
int i;
for (i = 0; i < argc; i++) {
if (!argv[i])
continue;
RADIUS_DEBUG("Session DB: %s=%s", col[i], argv[i]);
if (os_strcmp(col[i], "identity") == 0) {
os_free(fields->identity);
fields->identity = os_strdup(argv[i]);
} else if (os_strcmp(col[i], "nas") == 0) {
os_free(fields->nas);
fields->nas = os_strdup(argv[i]);
} else if (os_strcmp(col[i], "hs20_t_c_filtering") == 0) {
fields->hs20_t_c_filtering = atoi(argv[i]);
} else if (os_strcmp(col[i], "waiting_coa_ack") == 0) {
fields->waiting_coa_ack = atoi(argv[i]);
} else if (os_strcmp(col[i], "coa_ack_received") == 0) {
fields->coa_ack_received = atoi(argv[i]);
}
}
return 0;
}
static void free_db_session_fields(struct db_session_fields *fields)
{
os_free(fields->identity);
fields->identity = NULL;
os_free(fields->nas);
fields->nas = NULL;
}
#endif /* CONFIG_SQLITE */
int radius_server_dac_request(struct radius_server_data *data, const char *req)
{
#ifdef CONFIG_SQLITE
char *sql;
int res;
int disconnect;
const char *pos = req;
u8 addr[ETH_ALEN];
char addrtxt[3 * ETH_ALEN];
int t_c_clear = 0;
struct db_session_fields fields;
struct sockaddr_in das;
struct radius_client *client;
struct radius_msg *msg;
struct wpabuf *buf;
u8 identifier;
struct os_time now;
if (!data)
return -1;
/* req: <disconnect|coa> <MAC Address> [t_c_clear] */
if (os_strncmp(pos, "disconnect ", 11) == 0) {
disconnect = 1;
pos += 11;
} else if (os_strncmp(req, "coa ", 4) == 0) {
disconnect = 0;
pos += 4;
} else {
return -1;
}
if (hwaddr_aton(pos, addr))
return -1;
pos = os_strchr(pos, ' ');
if (pos) {
if (os_strstr(pos, "t_c_clear"))
t_c_clear = 1;
}
if (!disconnect && !t_c_clear) {
RADIUS_ERROR("DAC request for CoA without any authorization change");
return -1;
}
if (!data->db) {
RADIUS_ERROR("SQLite database not in use");
return -1;
}
os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(addr));
sql = sqlite3_mprintf("SELECT * FROM current_sessions WHERE mac_addr=%Q",
addrtxt);
if (!sql)
return -1;
os_memset(&fields, 0, sizeof(fields));
res = sqlite3_exec(data->db, sql, get_db_session_fields, &fields, NULL);
sqlite3_free(sql);
if (res != SQLITE_OK) {
RADIUS_ERROR("Failed to find matching current_sessions entry from sqlite database: %s",
sqlite3_errmsg(data->db));
free_db_session_fields(&fields);
return -1;
}
if (!fields.nas) {
RADIUS_ERROR("No NAS information found from current_sessions");
free_db_session_fields(&fields);
return -1;
}
os_memset(&das, 0, sizeof(das));
das.sin_family = AF_INET;
das.sin_addr.s_addr = inet_addr(fields.nas);
das.sin_port = htons(3799);
free_db_session_fields(&fields);
client = radius_server_get_client(data, &das.sin_addr, 0);
if (!client) {
RADIUS_ERROR("No NAS information available to protect the packet");
return -1;
}
identifier = client->next_dac_identifier++;
msg = radius_msg_new(disconnect ? RADIUS_CODE_DISCONNECT_REQUEST :
RADIUS_CODE_COA_REQUEST, identifier);
if (!msg)
return -1;
os_snprintf(addrtxt, sizeof(addrtxt), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(addr));
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
(u8 *) addrtxt, os_strlen(addrtxt))) {
RADIUS_ERROR("Could not add Calling-Station-Id");
radius_msg_free(msg);
return -1;
}
if (!disconnect && t_c_clear) {
u8 val[4] = { 0x00, 0x00, 0x00, 0x00 }; /* E=0 */
if (!radius_msg_add_wfa(
msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING,
val, sizeof(val))) {
RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering");
radius_msg_free(msg);
return -1;
}
}
os_get_time(&now);
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
now.sec)) {
RADIUS_ERROR("Failed to add Event-Timestamp attribute");
radius_msg_free(msg);
return -1;
}
radius_msg_finish_acct(msg, (u8 *) client->shared_secret,
client->shared_secret_len);
if (wpa_debug_level <= MSG_MSGDUMP)
radius_msg_dump(msg);
buf = radius_msg_get_buf(msg);
if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
(struct sockaddr *) &das, sizeof(das)) < 0) {
RADIUS_ERROR("Failed to send packet - sendto: %s",
strerror(errno));
radius_msg_free(msg);
return -1;
}
if (disconnect) {
radius_msg_free(client->pending_dac_disconnect_req);
client->pending_dac_disconnect_req = msg;
client->pending_dac_disconnect_id = identifier;
os_memcpy(client->pending_dac_disconnect_addr, addr, ETH_ALEN);
} else {
radius_msg_free(client->pending_dac_coa_req);
client->pending_dac_coa_req = msg;
client->pending_dac_coa_id = identifier;
os_memcpy(client->pending_dac_coa_addr, addr, ETH_ALEN);
}
return 0;
#else /* CONFIG_SQLITE */
return -1;
#endif /* CONFIG_SQLITE */
}
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