| /* |
| * hostapd / WPA authenticator glue code |
| * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi> |
| * |
| * This software may be distributed under the terms of the BSD license. |
| * See README for more details. |
| */ |
| |
| #include "utils/includes.h" |
| |
| #include "utils/common.h" |
| #include "common/ieee802_11_defs.h" |
| #include "eapol_auth/eapol_auth_sm.h" |
| #include "eapol_auth/eapol_auth_sm_i.h" |
| #include "eap_server/eap.h" |
| #include "l2_packet/l2_packet.h" |
| #include "drivers/driver.h" |
| #include "hostapd.h" |
| #include "ieee802_1x.h" |
| #include "preauth_auth.h" |
| #include "sta_info.h" |
| #include "tkip_countermeasures.h" |
| #include "ap_drv_ops.h" |
| #include "ap_config.h" |
| #include "wpa_auth.h" |
| #include "wpa_auth_glue.h" |
| |
| |
| static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf, |
| struct wpa_auth_config *wconf) |
| { |
| os_memset(wconf, 0, sizeof(*wconf)); |
| wconf->wpa = conf->wpa; |
| wconf->wpa_key_mgmt = conf->wpa_key_mgmt; |
| wconf->wpa_pairwise = conf->wpa_pairwise; |
| wconf->wpa_group = conf->wpa_group; |
| wconf->wpa_group_rekey = conf->wpa_group_rekey; |
| wconf->wpa_strict_rekey = conf->wpa_strict_rekey; |
| wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey; |
| wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey; |
| wconf->rsn_pairwise = conf->rsn_pairwise; |
| wconf->rsn_preauth = conf->rsn_preauth; |
| wconf->eapol_version = conf->eapol_version; |
| wconf->peerkey = conf->peerkey; |
| wconf->wmm_enabled = conf->wmm_enabled; |
| wconf->wmm_uapsd = conf->wmm_uapsd; |
| wconf->disable_pmksa_caching = conf->disable_pmksa_caching; |
| wconf->okc = conf->okc; |
| #ifdef CONFIG_IEEE80211W |
| wconf->ieee80211w = conf->ieee80211w; |
| #endif /* CONFIG_IEEE80211W */ |
| #ifdef CONFIG_IEEE80211R |
| wconf->ssid_len = conf->ssid.ssid_len; |
| if (wconf->ssid_len > SSID_LEN) |
| wconf->ssid_len = SSID_LEN; |
| os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len); |
| os_memcpy(wconf->mobility_domain, conf->mobility_domain, |
| MOBILITY_DOMAIN_ID_LEN); |
| if (conf->nas_identifier && |
| os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) { |
| wconf->r0_key_holder_len = os_strlen(conf->nas_identifier); |
| os_memcpy(wconf->r0_key_holder, conf->nas_identifier, |
| wconf->r0_key_holder_len); |
| } |
| os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN); |
| wconf->r0_key_lifetime = conf->r0_key_lifetime; |
| wconf->reassociation_deadline = conf->reassociation_deadline; |
| wconf->r0kh_list = conf->r0kh_list; |
| wconf->r1kh_list = conf->r1kh_list; |
| wconf->pmk_r1_push = conf->pmk_r1_push; |
| wconf->ft_over_ds = conf->ft_over_ds; |
| #endif /* CONFIG_IEEE80211R */ |
| #ifdef CONFIG_HS20 |
| wconf->disable_gtk = conf->disable_dgaf; |
| #endif /* CONFIG_HS20 */ |
| } |
| |
| |
| static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr, |
| logger_level level, const char *txt) |
| { |
| #ifndef CONFIG_NO_HOSTAPD_LOGGER |
| struct hostapd_data *hapd = ctx; |
| int hlevel; |
| |
| switch (level) { |
| case LOGGER_WARNING: |
| hlevel = HOSTAPD_LEVEL_WARNING; |
| break; |
| case LOGGER_INFO: |
| hlevel = HOSTAPD_LEVEL_INFO; |
| break; |
| case LOGGER_DEBUG: |
| default: |
| hlevel = HOSTAPD_LEVEL_DEBUG; |
| break; |
| } |
| |
| hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt); |
| #endif /* CONFIG_NO_HOSTAPD_LOGGER */ |
| } |
| |
| |
| static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr, |
| u16 reason) |
| { |
| struct hostapd_data *hapd = ctx; |
| wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: " |
| "STA " MACSTR " reason %d", |
| __func__, MAC2STR(addr), reason); |
| ap_sta_disconnect(hapd, NULL, addr, reason); |
| } |
| |
| |
| static int hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) |
| { |
| struct hostapd_data *hapd = ctx; |
| return michael_mic_failure(hapd, addr, 0); |
| } |
| |
| |
| static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr, |
| wpa_eapol_variable var, int value) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct sta_info *sta = ap_get_sta(hapd, addr); |
| if (sta == NULL) |
| return; |
| switch (var) { |
| case WPA_EAPOL_portEnabled: |
| ieee802_1x_notify_port_enabled(sta->eapol_sm, value); |
| break; |
| case WPA_EAPOL_portValid: |
| ieee802_1x_notify_port_valid(sta->eapol_sm, value); |
| break; |
| case WPA_EAPOL_authorized: |
| ieee802_1x_set_sta_authorized(hapd, sta, value); |
| break; |
| case WPA_EAPOL_portControl_Auto: |
| if (sta->eapol_sm) |
| sta->eapol_sm->portControl = Auto; |
| break; |
| case WPA_EAPOL_keyRun: |
| if (sta->eapol_sm) |
| sta->eapol_sm->keyRun = value ? TRUE : FALSE; |
| break; |
| case WPA_EAPOL_keyAvailable: |
| if (sta->eapol_sm) |
| sta->eapol_sm->eap_if->eapKeyAvailable = |
| value ? TRUE : FALSE; |
| break; |
| case WPA_EAPOL_keyDone: |
| if (sta->eapol_sm) |
| sta->eapol_sm->keyDone = value ? TRUE : FALSE; |
| break; |
| case WPA_EAPOL_inc_EapolFramesTx: |
| if (sta->eapol_sm) |
| sta->eapol_sm->dot1xAuthEapolFramesTx++; |
| break; |
| } |
| } |
| |
| |
| static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr, |
| wpa_eapol_variable var) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct sta_info *sta = ap_get_sta(hapd, addr); |
| if (sta == NULL || sta->eapol_sm == NULL) |
| return -1; |
| switch (var) { |
| case WPA_EAPOL_keyRun: |
| return sta->eapol_sm->keyRun; |
| case WPA_EAPOL_keyAvailable: |
| return sta->eapol_sm->eap_if->eapKeyAvailable; |
| default: |
| return -1; |
| } |
| } |
| |
| |
| static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr, |
| const u8 *prev_psk) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct sta_info *sta = ap_get_sta(hapd, addr); |
| const u8 *psk = hostapd_get_psk(hapd->conf, addr, prev_psk); |
| /* |
| * This is about to iterate over all psks, prev_psk gives the last |
| * returned psk which should not be returned again. |
| * logic list (all hostapd_get_psk; all sta->psk) |
| */ |
| if (sta && sta->psk && !psk) { |
| struct hostapd_sta_wpa_psk_short *pos; |
| psk = sta->psk->psk; |
| for (pos = sta->psk; pos; pos = pos->next) { |
| if (pos->psk == prev_psk) { |
| psk = pos->next ? pos->next->psk : NULL; |
| break; |
| } |
| } |
| } |
| return psk; |
| } |
| |
| |
| static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, |
| size_t *len) |
| { |
| struct hostapd_data *hapd = ctx; |
| const u8 *key; |
| size_t keylen; |
| struct sta_info *sta; |
| |
| sta = ap_get_sta(hapd, addr); |
| if (sta == NULL) |
| return -1; |
| |
| key = ieee802_1x_get_key(sta->eapol_sm, &keylen); |
| if (key == NULL) |
| return -1; |
| |
| if (keylen > *len) |
| keylen = *len; |
| os_memcpy(msk, key, keylen); |
| *len = keylen; |
| |
| return 0; |
| } |
| |
| |
| static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, |
| const u8 *addr, int idx, u8 *key, |
| size_t key_len) |
| { |
| struct hostapd_data *hapd = ctx; |
| const char *ifname = hapd->conf->iface; |
| |
| if (vlan_id > 0) { |
| ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); |
| if (ifname == NULL) |
| return -1; |
| } |
| |
| return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, |
| key, key_len); |
| } |
| |
| |
| static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, |
| u8 *seq) |
| { |
| struct hostapd_data *hapd = ctx; |
| return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); |
| } |
| |
| |
| static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, |
| const u8 *data, size_t data_len, |
| int encrypt) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct sta_info *sta; |
| u32 flags = 0; |
| |
| sta = ap_get_sta(hapd, addr); |
| if (sta) |
| flags = hostapd_sta_flags_to_drv(sta->flags); |
| |
| return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len, |
| encrypt, flags); |
| } |
| |
| |
| static int hostapd_wpa_auth_for_each_sta( |
| void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), |
| void *cb_ctx) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct sta_info *sta; |
| |
| for (sta = hapd->sta_list; sta; sta = sta->next) { |
| if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| |
| struct wpa_auth_iface_iter_data { |
| int (*cb)(struct wpa_authenticator *sm, void *ctx); |
| void *cb_ctx; |
| }; |
| |
| static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) |
| { |
| struct wpa_auth_iface_iter_data *data = ctx; |
| size_t i; |
| for (i = 0; i < iface->num_bss; i++) { |
| if (iface->bss[i]->wpa_auth && |
| data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| |
| static int hostapd_wpa_auth_for_each_auth( |
| void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), |
| void *cb_ctx) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct wpa_auth_iface_iter_data data; |
| if (hapd->iface->interfaces == NULL || |
| hapd->iface->interfaces->for_each_interface == NULL) |
| return -1; |
| data.cb = cb; |
| data.cb_ctx = cb_ctx; |
| return hapd->iface->interfaces->for_each_interface( |
| hapd->iface->interfaces, wpa_auth_iface_iter, &data); |
| } |
| |
| |
| #ifdef CONFIG_IEEE80211R |
| |
| struct wpa_auth_ft_iface_iter_data { |
| struct hostapd_data *src_hapd; |
| const u8 *dst; |
| const u8 *data; |
| size_t data_len; |
| }; |
| |
| |
| static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) |
| { |
| struct wpa_auth_ft_iface_iter_data *idata = ctx; |
| struct hostapd_data *hapd; |
| size_t j; |
| |
| for (j = 0; j < iface->num_bss; j++) { |
| hapd = iface->bss[j]; |
| if (hapd == idata->src_hapd) |
| continue; |
| if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) { |
| wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to " |
| "locally managed BSS " MACSTR "@%s -> " |
| MACSTR "@%s", |
| MAC2STR(idata->src_hapd->own_addr), |
| idata->src_hapd->conf->iface, |
| MAC2STR(hapd->own_addr), hapd->conf->iface); |
| wpa_ft_rrb_rx(hapd->wpa_auth, |
| idata->src_hapd->own_addr, |
| idata->data, idata->data_len); |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| #endif /* CONFIG_IEEE80211R */ |
| |
| |
| static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, |
| const u8 *data, size_t data_len) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct l2_ethhdr *buf; |
| int ret; |
| |
| #ifdef CONFIG_IEEE80211R |
| if (proto == ETH_P_RRB && hapd->iface->interfaces && |
| hapd->iface->interfaces->for_each_interface) { |
| int res; |
| struct wpa_auth_ft_iface_iter_data idata; |
| idata.src_hapd = hapd; |
| idata.dst = dst; |
| idata.data = data; |
| idata.data_len = data_len; |
| res = hapd->iface->interfaces->for_each_interface( |
| hapd->iface->interfaces, hostapd_wpa_auth_ft_iter, |
| &idata); |
| if (res == 1) |
| return data_len; |
| } |
| #endif /* CONFIG_IEEE80211R */ |
| |
| if (hapd->driver && hapd->driver->send_ether) |
| return hapd->driver->send_ether(hapd->drv_priv, dst, |
| hapd->own_addr, proto, |
| data, data_len); |
| if (hapd->l2 == NULL) |
| return -1; |
| |
| buf = os_malloc(sizeof(*buf) + data_len); |
| if (buf == NULL) |
| return -1; |
| os_memcpy(buf->h_dest, dst, ETH_ALEN); |
| os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN); |
| buf->h_proto = host_to_be16(proto); |
| os_memcpy(buf + 1, data, data_len); |
| ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf, |
| sizeof(*buf) + data_len); |
| os_free(buf); |
| return ret; |
| } |
| |
| |
| #ifdef CONFIG_IEEE80211R |
| |
| static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, |
| const u8 *data, size_t data_len) |
| { |
| struct hostapd_data *hapd = ctx; |
| int res; |
| struct ieee80211_mgmt *m; |
| size_t mlen; |
| struct sta_info *sta; |
| |
| sta = ap_get_sta(hapd, dst); |
| if (sta == NULL || sta->wpa_sm == NULL) |
| return -1; |
| |
| m = os_zalloc(sizeof(*m) + data_len); |
| if (m == NULL) |
| return -1; |
| mlen = ((u8 *) &m->u - (u8 *) m) + data_len; |
| m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, |
| WLAN_FC_STYPE_ACTION); |
| os_memcpy(m->da, dst, ETH_ALEN); |
| os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); |
| os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); |
| os_memcpy(&m->u, data, data_len); |
| |
| res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0); |
| os_free(m); |
| return res; |
| } |
| |
| |
| static struct wpa_state_machine * |
| hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct sta_info *sta; |
| |
| if (hostapd_add_sta_node(hapd, sta_addr, WLAN_AUTH_FT) < 0) |
| return NULL; |
| |
| sta = ap_sta_add(hapd, sta_addr); |
| if (sta == NULL) |
| return NULL; |
| if (sta->wpa_sm) { |
| sta->auth_alg = WLAN_AUTH_FT; |
| return sta->wpa_sm; |
| } |
| |
| sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); |
| if (sta->wpa_sm == NULL) { |
| ap_free_sta(hapd, sta); |
| return NULL; |
| } |
| sta->auth_alg = WLAN_AUTH_FT; |
| |
| return sta->wpa_sm; |
| } |
| |
| |
| static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, |
| size_t len) |
| { |
| struct hostapd_data *hapd = ctx; |
| struct l2_ethhdr *ethhdr; |
| if (len < sizeof(*ethhdr)) |
| return; |
| ethhdr = (struct l2_ethhdr *) buf; |
| wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " |
| MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest)); |
| wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr), |
| len - sizeof(*ethhdr)); |
| } |
| |
| |
| static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr, |
| u8 *tspec_ie, size_t tspec_ielen) |
| { |
| struct hostapd_data *hapd = ctx; |
| return hostapd_add_tspec(hapd, sta_addr, tspec_ie, tspec_ielen); |
| } |
| |
| #endif /* CONFIG_IEEE80211R */ |
| |
| |
| int hostapd_setup_wpa(struct hostapd_data *hapd) |
| { |
| struct wpa_auth_config _conf; |
| struct wpa_auth_callbacks cb; |
| const u8 *wpa_ie; |
| size_t wpa_ie_len; |
| |
| hostapd_wpa_auth_conf(hapd->conf, &_conf); |
| if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS) |
| _conf.tx_status = 1; |
| if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_MLME) |
| _conf.ap_mlme = 1; |
| os_memset(&cb, 0, sizeof(cb)); |
| cb.ctx = hapd; |
| cb.logger = hostapd_wpa_auth_logger; |
| cb.disconnect = hostapd_wpa_auth_disconnect; |
| cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report; |
| cb.set_eapol = hostapd_wpa_auth_set_eapol; |
| cb.get_eapol = hostapd_wpa_auth_get_eapol; |
| cb.get_psk = hostapd_wpa_auth_get_psk; |
| cb.get_msk = hostapd_wpa_auth_get_msk; |
| cb.set_key = hostapd_wpa_auth_set_key; |
| cb.get_seqnum = hostapd_wpa_auth_get_seqnum; |
| cb.send_eapol = hostapd_wpa_auth_send_eapol; |
| cb.for_each_sta = hostapd_wpa_auth_for_each_sta; |
| cb.for_each_auth = hostapd_wpa_auth_for_each_auth; |
| cb.send_ether = hostapd_wpa_auth_send_ether; |
| #ifdef CONFIG_IEEE80211R |
| cb.send_ft_action = hostapd_wpa_auth_send_ft_action; |
| cb.add_sta = hostapd_wpa_auth_add_sta; |
| cb.add_tspec = hostapd_wpa_auth_add_tspec; |
| #endif /* CONFIG_IEEE80211R */ |
| hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb); |
| if (hapd->wpa_auth == NULL) { |
| wpa_printf(MSG_ERROR, "WPA initialization failed."); |
| return -1; |
| } |
| |
| if (hostapd_set_privacy(hapd, 1)) { |
| wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " |
| "for interface %s", hapd->conf->iface); |
| return -1; |
| } |
| |
| wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); |
| if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { |
| wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " |
| "the kernel driver."); |
| return -1; |
| } |
| |
| if (rsn_preauth_iface_init(hapd)) { |
| wpa_printf(MSG_ERROR, "Initialization of RSN " |
| "pre-authentication failed."); |
| return -1; |
| } |
| |
| #ifdef CONFIG_IEEE80211R |
| if (!hostapd_drv_none(hapd)) { |
| hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ? |
| hapd->conf->bridge : |
| hapd->conf->iface, NULL, ETH_P_RRB, |
| hostapd_rrb_receive, hapd, 1); |
| if (hapd->l2 == NULL && |
| (hapd->driver == NULL || |
| hapd->driver->send_ether == NULL)) { |
| wpa_printf(MSG_ERROR, "Failed to open l2_packet " |
| "interface"); |
| return -1; |
| } |
| } |
| #endif /* CONFIG_IEEE80211R */ |
| |
| return 0; |
| |
| } |
| |
| |
| void hostapd_reconfig_wpa(struct hostapd_data *hapd) |
| { |
| struct wpa_auth_config wpa_auth_conf; |
| hostapd_wpa_auth_conf(hapd->conf, &wpa_auth_conf); |
| wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); |
| } |
| |
| |
| void hostapd_deinit_wpa(struct hostapd_data *hapd) |
| { |
| ieee80211_tkip_countermeasures_deinit(hapd); |
| rsn_preauth_iface_deinit(hapd); |
| if (hapd->wpa_auth) { |
| wpa_deinit(hapd->wpa_auth); |
| hapd->wpa_auth = NULL; |
| |
| if (hostapd_set_privacy(hapd, 0)) { |
| wpa_printf(MSG_DEBUG, "Could not disable " |
| "PrivacyInvoked for interface %s", |
| hapd->conf->iface); |
| } |
| |
| if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { |
| wpa_printf(MSG_DEBUG, "Could not remove generic " |
| "information element from interface %s", |
| hapd->conf->iface); |
| } |
| } |
| ieee802_1x_deinit(hapd); |
| |
| #ifdef CONFIG_IEEE80211R |
| l2_packet_deinit(hapd->l2); |
| #endif /* CONFIG_IEEE80211R */ |
| } |