/*
* hostapd / IEEE 802.11 authentication (ACL)
- * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2003-2012, 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*
* Access control list for IEEE 802.11 authentication can uses statically
* configured ACL from configuration files or an external RADIUS server.
#include "utils/common.h"
#include "utils/eloop.h"
+#include "crypto/sha1.h"
#include "radius/radius.h"
#include "radius/radius_client.h"
#include "hostapd.h"
#include "ap_config.h"
+#include "ap_drv_ops.h"
#include "ieee802_11.h"
+#include "ieee802_1x.h"
#include "ieee802_11_auth.h"
#define RADIUS_ACL_TIMEOUT 30
struct hostapd_cached_radius_acl {
- time_t timestamp;
+ struct os_reltime timestamp;
macaddr addr;
int accepted; /* HOSTAPD_ACL_* */
struct hostapd_cached_radius_acl *next;
u32 session_timeout;
u32 acct_interim_interval;
int vlan_id;
+ struct hostapd_sta_wpa_psk_short *psk;
+ char *identity;
+ char *radius_cui;
};
struct hostapd_acl_query_data {
- time_t timestamp;
+ struct os_reltime timestamp;
u8 radius_id;
macaddr addr;
u8 *auth_msg; /* IEEE 802.11 authentication frame from station */
#ifndef CONFIG_NO_RADIUS
+static void hostapd_acl_cache_free_entry(struct hostapd_cached_radius_acl *e)
+{
+ os_free(e->identity);
+ os_free(e->radius_cui);
+ hostapd_free_psk_list(e->psk);
+ os_free(e);
+}
+
+
static void hostapd_acl_cache_free(struct hostapd_cached_radius_acl *acl_cache)
{
struct hostapd_cached_radius_acl *prev;
while (acl_cache) {
prev = acl_cache;
acl_cache = acl_cache->next;
- os_free(prev);
+ hostapd_acl_cache_free_entry(prev);
+ }
+}
+
+
+static void copy_psk_list(struct hostapd_sta_wpa_psk_short **psk,
+ struct hostapd_sta_wpa_psk_short *src)
+{
+ struct hostapd_sta_wpa_psk_short **copy_to;
+ struct hostapd_sta_wpa_psk_short *copy_from;
+
+ /* Copy PSK linked list */
+ copy_to = psk;
+ copy_from = src;
+ while (copy_from && copy_to) {
+ *copy_to = os_zalloc(sizeof(struct hostapd_sta_wpa_psk_short));
+ if (*copy_to == NULL)
+ break;
+ os_memcpy(*copy_to, copy_from,
+ sizeof(struct hostapd_sta_wpa_psk_short));
+ copy_from = copy_from->next;
+ copy_to = &((*copy_to)->next);
}
+ if (copy_to)
+ *copy_to = NULL;
}
static int hostapd_acl_cache_get(struct hostapd_data *hapd, const u8 *addr,
u32 *session_timeout,
- u32 *acct_interim_interval, int *vlan_id)
+ u32 *acct_interim_interval, int *vlan_id,
+ struct hostapd_sta_wpa_psk_short **psk,
+ char **identity, char **radius_cui)
{
struct hostapd_cached_radius_acl *entry;
- time_t now;
+ struct os_reltime now;
- time(&now);
- entry = hapd->acl_cache;
+ os_get_reltime(&now);
- while (entry) {
- if (os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
- if (now - entry->timestamp > RADIUS_ACL_TIMEOUT)
- return -1; /* entry has expired */
- if (entry->accepted == HOSTAPD_ACL_ACCEPT_TIMEOUT)
- if (session_timeout)
- *session_timeout =
- entry->session_timeout;
- if (acct_interim_interval)
- *acct_interim_interval =
- entry->acct_interim_interval;
- if (vlan_id)
- *vlan_id = entry->vlan_id;
- return entry->accepted;
- }
+ for (entry = hapd->acl_cache; entry; entry = entry->next) {
+ if (os_memcmp(entry->addr, addr, ETH_ALEN) != 0)
+ continue;
- entry = entry->next;
+ if (os_reltime_expired(&now, &entry->timestamp,
+ RADIUS_ACL_TIMEOUT))
+ return -1; /* entry has expired */
+ if (entry->accepted == HOSTAPD_ACL_ACCEPT_TIMEOUT)
+ if (session_timeout)
+ *session_timeout = entry->session_timeout;
+ if (acct_interim_interval)
+ *acct_interim_interval =
+ entry->acct_interim_interval;
+ if (vlan_id)
+ *vlan_id = entry->vlan_id;
+ copy_psk_list(psk, entry->psk);
+ if (identity) {
+ if (entry->identity)
+ *identity = os_strdup(entry->identity);
+ else
+ *identity = NULL;
+ }
+ if (radius_cui) {
+ if (entry->radius_cui)
+ *radius_cui = os_strdup(entry->radius_cui);
+ else
+ *radius_cui = NULL;
+ }
+ return entry->accepted;
}
return -1;
goto fail;
}
- if (hapd->conf->own_ip_addr.af == AF_INET &&
- !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
- (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
- wpa_printf(MSG_DEBUG, "Could not add NAS-IP-Address");
+ if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr,
+ NULL, msg) < 0)
goto fail;
- }
-
-#ifdef CONFIG_IPV6
- if (hapd->conf->own_ip_addr.af == AF_INET6 &&
- !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
- (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
- wpa_printf(MSG_DEBUG, "Could not add NAS-IPv6-Address");
- goto fail;
- }
-#endif /* CONFIG_IPV6 */
-
- if (hapd->conf->nas_identifier &&
- !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
- (u8 *) hapd->conf->nas_identifier,
- os_strlen(hapd->conf->nas_identifier))) {
- wpa_printf(MSG_DEBUG, "Could not add NAS-Identifier");
- goto fail;
- }
-
- os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
- MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
- if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
- (u8 *) buf, os_strlen(buf))) {
- wpa_printf(MSG_DEBUG, "Could not add Called-Station-Id");
- goto fail;
- }
os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
MAC2STR(addr));
goto fail;
}
- if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
- RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
- wpa_printf(MSG_DEBUG, "Could not add NAS-Port-Type");
- goto fail;
- }
-
os_snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
(u8 *) buf, os_strlen(buf))) {
goto fail;
}
- radius_client_send(hapd->radius, msg, RADIUS_AUTH, addr);
+ if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, addr) < 0)
+ goto fail;
return 0;
fail:
* @session_timeout: Buffer for returning session timeout (from RADIUS)
* @acct_interim_interval: Buffer for returning account interval (from RADIUS)
* @vlan_id: Buffer for returning VLAN ID
+ * @psk: Linked list buffer for returning WPA PSK
+ * @identity: Buffer for returning identity (from RADIUS)
+ * @radius_cui: Buffer for returning CUI (from RADIUS)
* Returns: HOSTAPD_ACL_ACCEPT, HOSTAPD_ACL_REJECT, or HOSTAPD_ACL_PENDING
+ *
+ * The caller is responsible for freeing the returned *identity and *radius_cui
+ * values with os_free().
*/
int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
const u8 *msg, size_t len, u32 *session_timeout,
- u32 *acct_interim_interval, int *vlan_id)
+ u32 *acct_interim_interval, int *vlan_id,
+ struct hostapd_sta_wpa_psk_short **psk,
+ char **identity, char **radius_cui)
{
if (session_timeout)
*session_timeout = 0;
*acct_interim_interval = 0;
if (vlan_id)
*vlan_id = 0;
+ if (psk)
+ *psk = NULL;
+ if (identity)
+ *identity = NULL;
+ if (radius_cui)
+ *radius_cui = NULL;
if (hostapd_maclist_found(hapd->conf->accept_mac,
hapd->conf->num_accept_mac, addr, vlan_id))
/* Check whether ACL cache has an entry for this station */
int res = hostapd_acl_cache_get(hapd, addr, session_timeout,
acct_interim_interval,
- vlan_id);
+ vlan_id, psk,
+ identity, radius_cui);
if (res == HOSTAPD_ACL_ACCEPT ||
res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
return res;
if (os_memcmp(query->addr, addr, ETH_ALEN) == 0) {
/* pending query in RADIUS retransmit queue;
* do not generate a new one */
+ if (identity) {
+ os_free(*identity);
+ *identity = NULL;
+ }
+ if (radius_cui) {
+ os_free(*radius_cui);
+ *radius_cui = NULL;
+ }
return HOSTAPD_ACL_PENDING;
}
query = query->next;
wpa_printf(MSG_ERROR, "malloc for query data failed");
return HOSTAPD_ACL_REJECT;
}
- time(&query->timestamp);
+ os_get_reltime(&query->timestamp);
os_memcpy(query->addr, addr, ETH_ALEN);
if (hostapd_radius_acl_query(hapd, addr, query)) {
wpa_printf(MSG_DEBUG, "Failed to send Access-Request "
#ifndef CONFIG_NO_RADIUS
-static void hostapd_acl_expire_cache(struct hostapd_data *hapd, time_t now)
+static void hostapd_acl_expire_cache(struct hostapd_data *hapd,
+ struct os_reltime *now)
{
struct hostapd_cached_radius_acl *prev, *entry, *tmp;
entry = hapd->acl_cache;
while (entry) {
- if (now - entry->timestamp > RADIUS_ACL_TIMEOUT) {
+ if (os_reltime_expired(now, &entry->timestamp,
+ RADIUS_ACL_TIMEOUT)) {
wpa_printf(MSG_DEBUG, "Cached ACL entry for " MACSTR
" has expired.", MAC2STR(entry->addr));
if (prev)
prev->next = entry->next;
else
hapd->acl_cache = entry->next;
-#ifdef CONFIG_DRIVER_RADIUS_ACL
- hapd->drv.set_radius_acl_expire(hapd, entry->addr);
-#endif /* CONFIG_DRIVER_RADIUS_ACL */
+ hostapd_drv_set_radius_acl_expire(hapd, entry->addr);
tmp = entry;
entry = entry->next;
- os_free(tmp);
+ hostapd_acl_cache_free_entry(tmp);
continue;
}
}
-static void hostapd_acl_expire_queries(struct hostapd_data *hapd, time_t now)
+static void hostapd_acl_expire_queries(struct hostapd_data *hapd,
+ struct os_reltime *now)
{
struct hostapd_acl_query_data *prev, *entry, *tmp;
entry = hapd->acl_queries;
while (entry) {
- if (now - entry->timestamp > RADIUS_ACL_TIMEOUT) {
+ if (os_reltime_expired(now, &entry->timestamp,
+ RADIUS_ACL_TIMEOUT)) {
wpa_printf(MSG_DEBUG, "ACL query for " MACSTR
" has expired.", MAC2STR(entry->addr));
if (prev)
/**
* hostapd_acl_expire - ACL cache expiration callback
- * @eloop_ctx: struct hostapd_data *
- * @timeout_ctx: Not used
+ * @hapd: struct hostapd_data *
*/
-static void hostapd_acl_expire(void *eloop_ctx, void *timeout_ctx)
+void hostapd_acl_expire(struct hostapd_data *hapd)
{
- struct hostapd_data *hapd = eloop_ctx;
- time_t now;
+ struct os_reltime now;
+
+ os_get_reltime(&now);
+ hostapd_acl_expire_cache(hapd, &now);
+ hostapd_acl_expire_queries(hapd, &now);
+}
- time(&now);
- hostapd_acl_expire_cache(hapd, now);
- hostapd_acl_expire_queries(hapd, now);
- eloop_register_timeout(10, 0, hostapd_acl_expire, hapd, NULL);
+static void decode_tunnel_passwords(struct hostapd_data *hapd,
+ const u8 *shared_secret,
+ size_t shared_secret_len,
+ struct radius_msg *msg,
+ struct radius_msg *req,
+ struct hostapd_cached_radius_acl *cache)
+{
+ int passphraselen;
+ char *passphrase, *strpassphrase;
+ size_t i;
+ struct hostapd_sta_wpa_psk_short *psk;
+
+ /*
+ * Decode all tunnel passwords as PSK and save them into a linked list.
+ */
+ for (i = 0; ; i++) {
+ passphrase = radius_msg_get_tunnel_password(
+ msg, &passphraselen, shared_secret, shared_secret_len,
+ req, i);
+ /*
+ * Passphrase is NULL iff there is no i-th Tunnel-Password
+ * attribute in msg.
+ */
+ if (passphrase == NULL)
+ break;
+ /*
+ * passphrase does not contain the NULL termination.
+ * Add it here as pbkdf2_sha1() requires it.
+ */
+ strpassphrase = os_zalloc(passphraselen + 1);
+ psk = os_zalloc(sizeof(struct hostapd_sta_wpa_psk_short));
+ if (strpassphrase && psk) {
+ os_memcpy(strpassphrase, passphrase, passphraselen);
+ pbkdf2_sha1(strpassphrase,
+ hapd->conf->ssid.ssid,
+ hapd->conf->ssid.ssid_len, 4096,
+ psk->psk, PMK_LEN);
+ psk->next = cache->psk;
+ cache->psk = psk;
+ psk = NULL;
+ }
+ os_free(strpassphrase);
+ os_free(psk);
+ os_free(passphrase);
+ }
}
wpa_printf(MSG_DEBUG, "Failed to add ACL cache entry");
goto done;
}
- time(&cache->timestamp);
+ os_get_reltime(&cache->timestamp);
os_memcpy(cache->addr, query->addr, sizeof(cache->addr));
if (hdr->code == RADIUS_CODE_ACCESS_ACCEPT) {
+ u8 *buf;
+ size_t len;
+
if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
&cache->session_timeout) == 0)
cache->accepted = HOSTAPD_ACL_ACCEPT_TIMEOUT;
}
cache->vlan_id = radius_msg_get_vlanid(msg);
+
+ decode_tunnel_passwords(hapd, shared_secret, shared_secret_len,
+ msg, req, cache);
+
+ if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME,
+ &buf, &len, NULL) == 0) {
+ cache->identity = os_zalloc(len + 1);
+ if (cache->identity)
+ os_memcpy(cache->identity, buf, len);
+ }
+ if (radius_msg_get_attr_ptr(
+ msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
+ &buf, &len, NULL) == 0) {
+ cache->radius_cui = os_zalloc(len + 1);
+ if (cache->radius_cui)
+ os_memcpy(cache->radius_cui, buf, len);
+ }
+
+ if (hapd->conf->wpa_psk_radius == PSK_RADIUS_REQUIRED &&
+ !cache->psk)
+ cache->accepted = HOSTAPD_ACL_REJECT;
+
+ if (cache->vlan_id &&
+ !hostapd_vlan_id_valid(hapd->conf->vlan, cache->vlan_id)) {
+ hostapd_logger(hapd, query->addr,
+ HOSTAPD_MODULE_RADIUS,
+ HOSTAPD_LEVEL_INFO,
+ "Invalid VLAN ID %d received from RADIUS server",
+ cache->vlan_id);
+ cache->vlan_id = 0;
+ }
+ if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
+ !cache->vlan_id)
+ cache->accepted = HOSTAPD_ACL_REJECT;
} else
cache->accepted = HOSTAPD_ACL_REJECT;
cache->next = hapd->acl_cache;
hapd->acl_cache = cache;
#ifdef CONFIG_DRIVER_RADIUS_ACL
- hapd->drv.set_radius_acl_auth(hapd, query->addr, cache->accepted,
- cache->session_timeout);
+ hostapd_drv_set_radius_acl_auth(hapd, query->addr, cache->accepted,
+ cache->session_timeout);
#else /* CONFIG_DRIVER_RADIUS_ACL */
#ifdef NEED_AP_MLME
/* Re-send original authentication frame for 802.11 processing */
if (radius_client_register(hapd->radius, RADIUS_AUTH,
hostapd_acl_recv_radius, hapd))
return -1;
-
- eloop_register_timeout(10, 0, hostapd_acl_expire, hapd, NULL);
#endif /* CONFIG_NO_RADIUS */
return 0;
struct hostapd_acl_query_data *query, *prev;
#ifndef CONFIG_NO_RADIUS
- eloop_cancel_timeout(hostapd_acl_expire, hapd, NULL);
-
hostapd_acl_cache_free(hapd->acl_cache);
#endif /* CONFIG_NO_RADIUS */
hostapd_acl_query_free(prev);
}
}
+
+
+void hostapd_free_psk_list(struct hostapd_sta_wpa_psk_short *psk)
+{
+ while (psk) {
+ struct hostapd_sta_wpa_psk_short *prev = psk;
+ psk = psk->next;
+ os_free(prev);
+ }
+}
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