/* * hostapd / IEEE 802.11 Management * Copyright (c) 2002-2017, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "utils/includes.h" #ifndef CONFIG_NATIVE_WINDOWS #include "utils/common.h" #include "utils/eloop.h" #include "crypto/crypto.h" #include "crypto/sha256.h" #include "crypto/sha384.h" #include "crypto/sha512.h" #include "crypto/random.h" #include "common/ieee802_11_defs.h" #include "common/ieee802_11_common.h" #include "common/wpa_ctrl.h" #include "common/sae.h" #include "common/dpp.h" #include "common/ocv.h" #include "common/wpa_common.h" #include "radius/radius.h" #include "radius/radius_client.h" #include "p2p/p2p.h" #include "wps/wps.h" #include "fst/fst.h" #include "hostapd.h" #include "beacon.h" #include "ieee802_11_auth.h" #include "sta_info.h" #include "ieee802_1x.h" #include "wpa_auth.h" #include "pmksa_cache_auth.h" #include "wmm.h" #include "ap_list.h" #include "accounting.h" #include "ap_config.h" #include "ap_mlme.h" #include "p2p_hostapd.h" #include "ap_drv_ops.h" #include "wnm_ap.h" #include "hw_features.h" #include "ieee802_11.h" #include "dfs.h" #include "mbo_ap.h" #include "rrm.h" #include "taxonomy.h" #include "fils_hlp.h" #include "dpp_hostapd.h" #include "gas_query_ap.h" #ifdef CONFIG_FILS static struct wpabuf * prepare_auth_resp_fils(struct hostapd_data *hapd, struct sta_info *sta, u16 *resp, struct rsn_pmksa_cache_entry *pmksa, struct wpabuf *erp_resp, const u8 *msk, size_t msk_len, int *is_pub); #endif /* CONFIG_FILS */ static void handle_auth(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int rssi, int from_queue); u8 * hostapd_eid_multi_ap(struct hostapd_data *hapd, u8 *eid) { u8 multi_ap_val = 0; if (!hapd->conf->multi_ap) return eid; if (hapd->conf->multi_ap & BACKHAUL_BSS) multi_ap_val |= MULTI_AP_BACKHAUL_BSS; if (hapd->conf->multi_ap & FRONTHAUL_BSS) multi_ap_val |= MULTI_AP_FRONTHAUL_BSS; return eid + add_multi_ap_ie(eid, 9, multi_ap_val); } u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid) { u8 *pos = eid; int i, num, count; int h2e_required; if (hapd->iface->current_rates == NULL) return eid; *pos++ = WLAN_EID_SUPP_RATES; num = hapd->iface->num_rates; if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) num++; if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) num++; h2e_required = (hapd->conf->sae_pwe == 1 || hostapd_sae_pw_id_in_use(hapd->conf) == 2) && hapd->conf->sae_pwe != 3 && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt); if (h2e_required) num++; if (num > 8) { /* rest of the rates are encoded in Extended supported * rates element */ num = 8; } *pos++ = num; for (i = 0, count = 0; i < hapd->iface->num_rates && count < num; i++) { count++; *pos = hapd->iface->current_rates[i].rate / 5; if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) *pos |= 0x80; pos++; } if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) { count++; *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; } if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) { count++; *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; } if (h2e_required && count < 8) { count++; *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E_ONLY; } return pos; } u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid) { u8 *pos = eid; int i, num, count; int h2e_required; if (hapd->iface->current_rates == NULL) return eid; num = hapd->iface->num_rates; if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) num++; if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) num++; h2e_required = (hapd->conf->sae_pwe == 1 || hostapd_sae_pw_id_in_use(hapd->conf) == 2) && hapd->conf->sae_pwe != 3 && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt); if (h2e_required) num++; if (num <= 8) return eid; num -= 8; *pos++ = WLAN_EID_EXT_SUPP_RATES; *pos++ = num; for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8; i++) { count++; if (count <= 8) continue; /* already in SuppRates IE */ *pos = hapd->iface->current_rates[i].rate / 5; if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC) *pos |= 0x80; pos++; } if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) { count++; if (count > 8) *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY; } if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) { count++; if (count > 8) *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY; } if (h2e_required) { count++; if (count > 8) *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E_ONLY; } return pos; } u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid, size_t len) { size_t i; for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) { if (hapd->conf->radio_measurements[i]) break; } if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN) return eid; *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES; *eid++ = RRM_CAPABILITIES_IE_LEN; os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN); return eid + RRM_CAPABILITIES_IE_LEN; } u16 hostapd_own_capab_info(struct hostapd_data *hapd) { int capab = WLAN_CAPABILITY_ESS; int privacy = 0; int dfs; int i; /* Check if any of configured channels require DFS */ dfs = hostapd_is_dfs_required(hapd->iface); if (dfs < 0) { wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d", dfs); dfs = 0; } if (hapd->iface->num_sta_no_short_preamble == 0 && hapd->iconf->preamble == SHORT_PREAMBLE) capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; #ifdef CONFIG_WEP privacy = hapd->conf->ssid.wep.keys_set; if (hapd->conf->ieee802_1x && (hapd->conf->default_wep_key_len || hapd->conf->individual_wep_key_len)) privacy = 1; #endif /* CONFIG_WEP */ if (hapd->conf->wpa) privacy = 1; #ifdef CONFIG_HS20 if (hapd->conf->osen) privacy = 1; #endif /* CONFIG_HS20 */ if (privacy) capab |= WLAN_CAPABILITY_PRIVACY; if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->iface->num_sta_no_short_slot_time == 0) capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; /* * Currently, Spectrum Management capability bit is set when directly * requested in configuration by spectrum_mgmt_required or when AP is * running on DFS channel. * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit */ if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A && (hapd->iconf->spectrum_mgmt_required || dfs)) capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) { if (hapd->conf->radio_measurements[i]) { capab |= IEEE80211_CAP_RRM; break; } } return capab; } #ifdef CONFIG_WEP #ifndef CONFIG_NO_RC4 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta, u16 auth_transaction, const u8 *challenge, int iswep) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication (shared key, transaction %d)", auth_transaction); if (auth_transaction == 1) { if (!sta->challenge) { /* Generate a pseudo-random challenge */ u8 key[8]; sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN); if (sta->challenge == NULL) return WLAN_STATUS_UNSPECIFIED_FAILURE; if (os_get_random(key, sizeof(key)) < 0) { os_free(sta->challenge); sta->challenge = NULL; return WLAN_STATUS_UNSPECIFIED_FAILURE; } rc4_skip(key, sizeof(key), 0, sta->challenge, WLAN_AUTH_CHALLENGE_LEN); } return 0; } if (auth_transaction != 3) return WLAN_STATUS_UNSPECIFIED_FAILURE; /* Transaction 3 */ if (!iswep || !sta->challenge || !challenge || os_memcmp_const(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "shared key authentication - invalid " "challenge-response"); return WLAN_STATUS_CHALLENGE_FAIL; } hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (shared key)"); sta->flags |= WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); os_free(sta->challenge); sta->challenge = NULL; return 0; } #endif /* CONFIG_NO_RC4 */ #endif /* CONFIG_WEP */ static int send_auth_reply(struct hostapd_data *hapd, struct sta_info *sta, const u8 *dst, const u8 *bssid, u16 auth_alg, u16 auth_transaction, u16 resp, const u8 *ies, size_t ies_len, const char *dbg) { struct ieee80211_mgmt *reply; u8 *buf; size_t rlen; int reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE; rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len; buf = os_zalloc(rlen); if (buf == NULL) return -1; reply = (struct ieee80211_mgmt *) buf; reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_AUTH); os_memcpy(reply->da, dst, ETH_ALEN); os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); os_memcpy(reply->bssid, bssid, ETH_ALEN); reply->u.auth.auth_alg = host_to_le16(auth_alg); reply->u.auth.auth_transaction = host_to_le16(auth_transaction); reply->u.auth.status_code = host_to_le16(resp); if (ies && ies_len) os_memcpy(reply->u.auth.variable, ies, ies_len); wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu) (dbg=%s)", MAC2STR(dst), auth_alg, auth_transaction, resp, (unsigned long) ies_len, dbg); #ifdef CONFIG_TESTING_OPTIONS #ifdef CONFIG_SAE if (hapd->conf->sae_confirm_immediate == 2 && auth_alg == WLAN_AUTH_SAE) { if (auth_transaction == 1 && sta && (resp == WLAN_STATUS_SUCCESS || resp == WLAN_STATUS_SAE_HASH_TO_ELEMENT)) { wpa_printf(MSG_DEBUG, "TESTING: Postpone SAE Commit transmission until Confirm is ready"); os_free(sta->sae_postponed_commit); sta->sae_postponed_commit = buf; sta->sae_postponed_commit_len = rlen; return WLAN_STATUS_SUCCESS; } if (auth_transaction == 2 && sta && sta->sae_postponed_commit) { wpa_printf(MSG_DEBUG, "TESTING: Send postponed SAE Commit first, immediately followed by SAE Confirm"); if (hostapd_drv_send_mlme(hapd, sta->sae_postponed_commit, sta->sae_postponed_commit_len, 0, NULL, 0, 0) < 0) wpa_printf(MSG_INFO, "send_auth_reply: send failed"); os_free(sta->sae_postponed_commit); sta->sae_postponed_commit = NULL; sta->sae_postponed_commit_len = 0; } } #endif /* CONFIG_SAE */ #endif /* CONFIG_TESTING_OPTIONS */ if (hostapd_drv_send_mlme(hapd, reply, rlen, 0, NULL, 0, 0) < 0) wpa_printf(MSG_INFO, "send_auth_reply: send failed"); else reply_res = WLAN_STATUS_SUCCESS; os_free(buf); return reply_res; } #ifdef CONFIG_IEEE80211R_AP static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid, u16 auth_transaction, u16 status, const u8 *ies, size_t ies_len) { struct hostapd_data *hapd = ctx; struct sta_info *sta; int reply_res; reply_res = send_auth_reply(hapd, NULL, dst, bssid, WLAN_AUTH_FT, auth_transaction, status, ies, ies_len, "auth-ft-finish"); sta = ap_get_sta(hapd, dst); if (sta == NULL) return; if (sta->added_unassoc && (reply_res != WLAN_STATUS_SUCCESS || status != WLAN_STATUS_SUCCESS)) { hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; return; } if (status != WLAN_STATUS_SUCCESS) return; hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); sta->flags |= WLAN_STA_AUTH; mlme_authenticate_indication(hapd, sta); } #endif /* CONFIG_IEEE80211R_AP */ #ifdef CONFIG_SAE static void sae_set_state(struct sta_info *sta, enum sae_state state, const char *reason) { wpa_printf(MSG_DEBUG, "SAE: State %s -> %s for peer " MACSTR " (%s)", sae_state_txt(sta->sae->state), sae_state_txt(state), MAC2STR(sta->addr), reason); sta->sae->state = state; } static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd, struct sta_info *sta, int update, int status_code) { struct wpabuf *buf; const char *password = NULL; struct sae_password_entry *pw; const char *rx_id = NULL; int use_pt = 0; struct sae_pt *pt = NULL; if (sta->sae->tmp) { rx_id = sta->sae->tmp->pw_id; use_pt = sta->sae->tmp->h2e; } if (rx_id && hapd->conf->sae_pwe != 3) use_pt = 1; else if (status_code == WLAN_STATUS_SUCCESS) use_pt = 0; else if (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT) use_pt = 1; for (pw = hapd->conf->sae_passwords; pw; pw = pw->next) { if (!is_broadcast_ether_addr(pw->peer_addr) && os_memcmp(pw->peer_addr, sta->addr, ETH_ALEN) != 0) continue; if ((rx_id && !pw->identifier) || (!rx_id && pw->identifier)) continue; if (rx_id && pw->identifier && os_strcmp(rx_id, pw->identifier) != 0) continue; password = pw->password; pt = pw->pt; break; } if (!password) { password = hapd->conf->ssid.wpa_passphrase; pt = hapd->conf->ssid.pt; } if (!password || (use_pt && !pt)) { wpa_printf(MSG_DEBUG, "SAE: No password available"); return NULL; } if (update && use_pt && sae_prepare_commit_pt(sta->sae, pt, hapd->own_addr, sta->addr, NULL) < 0) return NULL; if (update && !use_pt && sae_prepare_commit(hapd->own_addr, sta->addr, (u8 *) password, os_strlen(password), rx_id, sta->sae) < 0) { wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); return NULL; } if (pw && pw->vlan_id) { if (!sta->sae->tmp) { wpa_printf(MSG_INFO, "SAE: No temporary data allocated - cannot store VLAN ID"); return NULL; } sta->sae->tmp->vlan_id = pw->vlan_id; } buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN + (rx_id ? 3 + os_strlen(rx_id) : 0)); if (buf && sae_write_commit(sta->sae, buf, sta->sae->tmp ? sta->sae->tmp->anti_clogging_token : NULL, rx_id) < 0) { wpabuf_free(buf); buf = NULL; } return buf; } static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd, struct sta_info *sta) { struct wpabuf *buf; buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN); if (buf == NULL) return NULL; sae_write_confirm(sta->sae, buf); return buf; } static int auth_sae_send_commit(struct hostapd_data *hapd, struct sta_info *sta, const u8 *bssid, int update, int status_code) { struct wpabuf *data; int reply_res; u16 status; data = auth_build_sae_commit(hapd, sta, update, status_code); if (!data && sta->sae->tmp && sta->sae->tmp->pw_id) return WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER; if (data == NULL) return WLAN_STATUS_UNSPECIFIED_FAILURE; status = (sta->sae->tmp && sta->sae->tmp->h2e) ? WLAN_STATUS_SAE_HASH_TO_ELEMENT : WLAN_STATUS_SUCCESS; reply_res = send_auth_reply(hapd, sta, sta->addr, bssid, WLAN_AUTH_SAE, 1, status, wpabuf_head(data), wpabuf_len(data), "sae-send-commit"); wpabuf_free(data); return reply_res; } static int auth_sae_send_confirm(struct hostapd_data *hapd, struct sta_info *sta, const u8 *bssid) { struct wpabuf *data; int reply_res; data = auth_build_sae_confirm(hapd, sta); if (data == NULL) return WLAN_STATUS_UNSPECIFIED_FAILURE; reply_res = send_auth_reply(hapd, sta, sta->addr, bssid, WLAN_AUTH_SAE, 2, WLAN_STATUS_SUCCESS, wpabuf_head(data), wpabuf_len(data), "sae-send-confirm"); wpabuf_free(data); return reply_res; } static int use_sae_anti_clogging(struct hostapd_data *hapd) { struct sta_info *sta; unsigned int open = 0; if (hapd->conf->sae_anti_clogging_threshold == 0) return 1; for (sta = hapd->sta_list; sta; sta = sta->next) { if (!sta->sae) continue; if (sta->sae->state != SAE_COMMITTED && sta->sae->state != SAE_CONFIRMED) continue; open++; if (open >= hapd->conf->sae_anti_clogging_threshold) return 1; } /* In addition to already existing open SAE sessions, check whether * there are enough pending commit messages in the processing queue to * potentially result in too many open sessions. */ if (open + dl_list_len(&hapd->sae_commit_queue) >= hapd->conf->sae_anti_clogging_threshold) return 1; return 0; } static int sae_token_hash(struct hostapd_data *hapd, const u8 *addr, u8 *idx) { u8 hash[SHA256_MAC_LEN]; if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key), addr, ETH_ALEN, hash) < 0) return -1; *idx = hash[0]; return 0; } static int check_sae_token(struct hostapd_data *hapd, const u8 *addr, const u8 *token, size_t token_len) { u8 mac[SHA256_MAC_LEN]; const u8 *addrs[2]; size_t len[2]; u16 token_idx; u8 idx; if (token_len != SHA256_MAC_LEN || sae_token_hash(hapd, addr, &idx) < 0) return -1; token_idx = hapd->sae_pending_token_idx[idx]; if (token_idx == 0 || token_idx != WPA_GET_BE16(token)) { wpa_printf(MSG_DEBUG, "SAE: Invalid anti-clogging token from " MACSTR " - token_idx 0x%04x, expected 0x%04x", MAC2STR(addr), WPA_GET_BE16(token), token_idx); return -1; } addrs[0] = addr; len[0] = ETH_ALEN; addrs[1] = token; len[1] = 2; if (hmac_sha256_vector(hapd->sae_token_key, sizeof(hapd->sae_token_key), 2, addrs, len, mac) < 0 || os_memcmp_const(token + 2, &mac[2], SHA256_MAC_LEN - 2) != 0) return -1; hapd->sae_pending_token_idx[idx] = 0; /* invalidate used token */ return 0; } static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd, int group, const u8 *addr, int h2e) { struct wpabuf *buf; u8 *token; struct os_reltime now; u8 idx[2]; const u8 *addrs[2]; size_t len[2]; u8 p_idx; u16 token_idx; os_get_reltime(&now); if (!os_reltime_initialized(&hapd->last_sae_token_key_update) || os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60) || hapd->sae_token_idx == 0xffff) { if (random_get_bytes(hapd->sae_token_key, sizeof(hapd->sae_token_key)) < 0) return NULL; wpa_hexdump(MSG_DEBUG, "SAE: Updated token key", hapd->sae_token_key, sizeof(hapd->sae_token_key)); hapd->last_sae_token_key_update = now; hapd->sae_token_idx = 0; os_memset(hapd->sae_pending_token_idx, 0, sizeof(hapd->sae_pending_token_idx)); } buf = wpabuf_alloc(sizeof(le16) + 3 + SHA256_MAC_LEN); if (buf == NULL) return NULL; wpabuf_put_le16(buf, group); /* Finite Cyclic Group */ if (h2e) { /* Encapsulate Anti-clogging Token field in a container IE */ wpabuf_put_u8(buf, WLAN_EID_EXTENSION); wpabuf_put_u8(buf, 1 + SHA256_MAC_LEN); wpabuf_put_u8(buf, WLAN_EID_EXT_ANTI_CLOGGING_TOKEN); } if (sae_token_hash(hapd, addr, &p_idx) < 0) { wpabuf_free(buf); return NULL; } token_idx = hapd->sae_pending_token_idx[p_idx]; if (!token_idx) { hapd->sae_token_idx++; token_idx = hapd->sae_token_idx; hapd->sae_pending_token_idx[p_idx] = token_idx; } WPA_PUT_BE16(idx, token_idx); token = wpabuf_put(buf, SHA256_MAC_LEN); addrs[0] = addr; len[0] = ETH_ALEN; addrs[1] = idx; len[1] = sizeof(idx); if (hmac_sha256_vector(hapd->sae_token_key, sizeof(hapd->sae_token_key), 2, addrs, len, token) < 0) { wpabuf_free(buf); return NULL; } WPA_PUT_BE16(token, token_idx); return buf; } static int sae_check_big_sync(struct hostapd_data *hapd, struct sta_info *sta) { if (sta->sae->sync > hapd->conf->sae_sync) { sae_set_state(sta, SAE_NOTHING, "Sync > dot11RSNASAESync"); sta->sae->sync = 0; return -1; } return 0; } static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data) { struct hostapd_data *hapd = eloop_ctx; struct sta_info *sta = eloop_data; int ret; if (sae_check_big_sync(hapd, sta)) return; sta->sae->sync++; wpa_printf(MSG_DEBUG, "SAE: Auth SAE retransmit timer for " MACSTR " (sync=%d state=%s)", MAC2STR(sta->addr), sta->sae->sync, sae_state_txt(sta->sae->state)); switch (sta->sae->state) { case SAE_COMMITTED: ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0, -1); eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000, auth_sae_retransmit_timer, hapd, sta); break; case SAE_CONFIRMED: ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr); eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000, auth_sae_retransmit_timer, hapd, sta); break; default: ret = -1; break; } if (ret != WLAN_STATUS_SUCCESS) wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret); } void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta) { eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta); } static void sae_set_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta) { if (!(hapd->conf->mesh & MESH_ENABLED)) return; eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta); eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000, auth_sae_retransmit_timer, hapd, sta); } static void sae_sme_send_external_auth_status(struct hostapd_data *hapd, struct sta_info *sta, u16 status) { struct external_auth params; os_memset(¶ms, 0, sizeof(params)); params.status = status; params.bssid = sta->addr; if (status == WLAN_STATUS_SUCCESS && sta->sae && !hapd->conf->disable_pmksa_caching) params.pmkid = sta->sae->pmkid; hostapd_drv_send_external_auth_status(hapd, ¶ms); } void sae_accept_sta(struct hostapd_data *hapd, struct sta_info *sta) { #ifndef CONFIG_NO_VLAN struct vlan_description vlan_desc; if (sta->sae->tmp && sta->sae->tmp->vlan_id > 0) { wpa_printf(MSG_DEBUG, "SAE: Assign STA " MACSTR " to VLAN ID %d", MAC2STR(sta->addr), sta->sae->tmp->vlan_id); os_memset(&vlan_desc, 0, sizeof(vlan_desc)); vlan_desc.notempty = 1; vlan_desc.untagged = sta->sae->tmp->vlan_id; if (!hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) { wpa_printf(MSG_INFO, "Invalid VLAN ID %d in sae_password", sta->sae->tmp->vlan_id); return; } if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0 || ap_sta_bind_vlan(hapd, sta) < 0) { wpa_printf(MSG_INFO, "Failed to assign VLAN ID %d from sae_password to " MACSTR, sta->sae->tmp->vlan_id, MAC2STR(sta->addr)); return; } } #endif /* CONFIG_NO_VLAN */ sta->flags |= WLAN_STA_AUTH; sta->auth_alg = WLAN_AUTH_SAE; mlme_authenticate_indication(hapd, sta); wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); sae_set_state(sta, SAE_ACCEPTED, "Accept Confirm"); crypto_bignum_deinit(sta->sae->peer_commit_scalar_accepted, 0); sta->sae->peer_commit_scalar_accepted = sta->sae->peer_commit_scalar; sta->sae->peer_commit_scalar = NULL; wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr, sta->sae->pmk, sta->sae->pmkid); sae_sme_send_external_auth_status(hapd, sta, WLAN_STATUS_SUCCESS); } static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta, const u8 *bssid, u16 auth_transaction, u16 status_code, int allow_reuse, int *sta_removed) { int ret; *sta_removed = 0; if (auth_transaction != 1 && auth_transaction != 2) return WLAN_STATUS_UNSPECIFIED_FAILURE; wpa_printf(MSG_DEBUG, "SAE: Peer " MACSTR " state=%s auth_trans=%u", MAC2STR(sta->addr), sae_state_txt(sta->sae->state), auth_transaction); switch (sta->sae->state) { case SAE_NOTHING: if (auth_transaction == 1) { if (sta->sae->tmp) sta->sae->tmp->h2e = status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT; ret = auth_sae_send_commit(hapd, sta, bssid, !allow_reuse, status_code); if (ret) return ret; sae_set_state(sta, SAE_COMMITTED, "Sent Commit"); if (sae_process_commit(sta->sae) < 0) return WLAN_STATUS_UNSPECIFIED_FAILURE; /* * In mesh case, both Commit and Confirm are sent * immediately. In infrastructure BSS, by default, only * a single Authentication frame (Commit) is expected * from the AP here and the second one (Confirm) will * be sent once the STA has sent its second * Authentication frame (Confirm). This behavior can be * overridden with explicit configuration so that the * infrastructure BSS case sends both frames together. */ if ((hapd->conf->mesh & MESH_ENABLED) || hapd->conf->sae_confirm_immediate) { /* * Send both Commit and Confirm immediately * based on SAE finite state machine * Nothing -> Confirm transition. */ ret = auth_sae_send_confirm(hapd, sta, bssid); if (ret) return ret; sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm (mesh)"); } else { /* * For infrastructure BSS, send only the Commit * message now to get alternating sequence of * Authentication frames between the AP and STA. * Confirm will be sent in * Committed -> Confirmed/Accepted transition * when receiving Confirm from STA. */ } sta->sae->sync = 0; sae_set_retransmit_timer(hapd, sta); } else { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "SAE confirm before commit"); } break; case SAE_COMMITTED: sae_clear_retransmit_timer(hapd, sta); if (auth_transaction == 1) { if (sae_process_commit(sta->sae) < 0) return WLAN_STATUS_UNSPECIFIED_FAILURE; ret = auth_sae_send_confirm(hapd, sta, bssid); if (ret) return ret; sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm"); sta->sae->sync = 0; sae_set_retransmit_timer(hapd, sta); } else if (hapd->conf->mesh & MESH_ENABLED) { /* * In mesh case, follow SAE finite state machine and * send Commit now, if sync count allows. */ if (sae_check_big_sync(hapd, sta)) return WLAN_STATUS_SUCCESS; sta->sae->sync++; ret = auth_sae_send_commit(hapd, sta, bssid, 0, status_code); if (ret) return ret; sae_set_retransmit_timer(hapd, sta); } else { /* * For instructure BSS, send the postponed Confirm from * Nothing -> Confirmed transition that was reduced to * Nothing -> Committed above. */ ret = auth_sae_send_confirm(hapd, sta, bssid); if (ret) return ret; sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm"); /* * Since this was triggered on Confirm RX, run another * step to get to Accepted without waiting for * additional events. */ return sae_sm_step(hapd, sta, bssid, auth_transaction, WLAN_STATUS_SUCCESS, 0, sta_removed); } break; case SAE_CONFIRMED: sae_clear_retransmit_timer(hapd, sta); if (auth_transaction == 1) { if (sae_check_big_sync(hapd, sta)) return WLAN_STATUS_SUCCESS; sta->sae->sync++; ret = auth_sae_send_commit(hapd, sta, bssid, 1, status_code); if (ret) return ret; if (sae_process_commit(sta->sae) < 0) return WLAN_STATUS_UNSPECIFIED_FAILURE; ret = auth_sae_send_confirm(hapd, sta, bssid); if (ret) return ret; sae_set_retransmit_timer(hapd, sta); } else { sta->sae->send_confirm = 0xffff; sae_accept_sta(hapd, sta); } break; case SAE_ACCEPTED: if (auth_transaction == 1 && (hapd->conf->mesh & MESH_ENABLED)) { wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR ") doing reauthentication", MAC2STR(sta->addr)); wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); ap_free_sta(hapd, sta); *sta_removed = 1; } else if (auth_transaction == 1) { wpa_printf(MSG_DEBUG, "SAE: Start reauthentication"); ret = auth_sae_send_commit(hapd, sta, bssid, 1, status_code); if (ret) return ret; sae_set_state(sta, SAE_COMMITTED, "Sent Commit"); if (sae_process_commit(sta->sae) < 0) return WLAN_STATUS_UNSPECIFIED_FAILURE; sta->sae->sync = 0; sae_set_retransmit_timer(hapd, sta); } else { if (sae_check_big_sync(hapd, sta)) return WLAN_STATUS_SUCCESS; sta->sae->sync++; ret = auth_sae_send_confirm(hapd, sta, bssid); sae_clear_temp_data(sta->sae); if (ret) return ret; } break; default: wpa_printf(MSG_ERROR, "SAE: invalid state %d", sta->sae->state); return WLAN_STATUS_UNSPECIFIED_FAILURE; } return WLAN_STATUS_SUCCESS; } static void sae_pick_next_group(struct hostapd_data *hapd, struct sta_info *sta) { struct sae_data *sae = sta->sae; int i, *groups = hapd->conf->sae_groups; int default_groups[] = { 19, 0 }; if (sae->state != SAE_COMMITTED) return; wpa_printf(MSG_DEBUG, "SAE: Previously selected group: %d", sae->group); if (!groups) groups = default_groups; for (i = 0; groups[i] > 0; i++) { if (sae->group == groups[i]) break; } if (groups[i] <= 0) { wpa_printf(MSG_DEBUG, "SAE: Previously selected group not found from the current configuration"); return; } for (;;) { i++; if (groups[i] <= 0) { wpa_printf(MSG_DEBUG, "SAE: No alternative group enabled"); return; } if (sae_set_group(sae, groups[i]) < 0) continue; break; } wpa_printf(MSG_DEBUG, "SAE: Selected new group: %d", groups[i]); } static int sae_status_success(struct hostapd_data *hapd, u16 status_code) { int sae_pwe = hapd->conf->sae_pwe; int id_in_use; id_in_use = hostapd_sae_pw_id_in_use(hapd->conf); if (id_in_use == 2 && sae_pwe != 3) sae_pwe = 1; else if (id_in_use == 1 && sae_pwe == 0) sae_pwe = 2; return ((sae_pwe == 0 || sae_pwe == 3) && status_code == WLAN_STATUS_SUCCESS) || (sae_pwe == 1 && status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT) || (sae_pwe == 2 && (status_code == WLAN_STATUS_SUCCESS || status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT)); } static int sae_is_group_enabled(struct hostapd_data *hapd, int group) { int *groups = hapd->conf->sae_groups; int default_groups[] = { 19, 0 }; int i; if (!groups) groups = default_groups; for (i = 0; groups[i] > 0; i++) { if (groups[i] == group) return 1; } return 0; } static int check_sae_rejected_groups(struct hostapd_data *hapd, const struct wpabuf *groups) { size_t i, count; const u8 *pos; if (!groups) return 0; pos = wpabuf_head(groups); count = wpabuf_len(groups) / 2; for (i = 0; i < count; i++) { int enabled; u16 group; group = WPA_GET_LE16(pos); pos += 2; enabled = sae_is_group_enabled(hapd, group); wpa_printf(MSG_DEBUG, "SAE: Rejected group %u is %s", group, enabled ? "enabled" : "disabled"); if (enabled) return 1; } return 0; } static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta, const struct ieee80211_mgmt *mgmt, size_t len, u16 auth_transaction, u16 status_code) { int resp = WLAN_STATUS_SUCCESS; struct wpabuf *data = NULL; int *groups = hapd->conf->sae_groups; int default_groups[] = { 19, 0 }; const u8 *pos, *end; int sta_removed = 0; if (!groups) groups = default_groups; #ifdef CONFIG_TESTING_OPTIONS if (hapd->conf->sae_reflection_attack && auth_transaction == 1) { wpa_printf(MSG_DEBUG, "SAE: TESTING - reflection attack"); pos = mgmt->u.auth.variable; end = ((const u8 *) mgmt) + len; send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, auth_transaction, resp, pos, end - pos, "auth-sae-reflection-attack"); goto remove_sta; } if (hapd->conf->sae_commit_override && auth_transaction == 1) { wpa_printf(MSG_DEBUG, "SAE: TESTING - commit override"); send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, auth_transaction, resp, wpabuf_head(hapd->conf->sae_commit_override), wpabuf_len(hapd->conf->sae_commit_override), "sae-commit-override"); goto remove_sta; } #endif /* CONFIG_TESTING_OPTIONS */ if (!sta->sae) { if (auth_transaction != 1 || !sae_status_success(hapd, status_code)) { wpa_printf(MSG_DEBUG, "SAE: Unexpected Status Code %u", status_code); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto reply; } sta->sae = os_zalloc(sizeof(*sta->sae)); if (!sta->sae) { resp = -1; goto remove_sta; } sae_set_state(sta, SAE_NOTHING, "Init"); sta->sae->sync = 0; } if (sta->mesh_sae_pmksa_caching) { wpa_printf(MSG_DEBUG, "SAE: Cancel use of mesh PMKSA caching because peer starts SAE authentication"); wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); sta->mesh_sae_pmksa_caching = 0; } if (auth_transaction == 1) { const u8 *token = NULL; size_t token_len = 0; int allow_reuse = 0; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "start SAE authentication (RX commit, status=%u (%s))", status_code, status2str(status_code)); if ((hapd->conf->mesh & MESH_ENABLED) && status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && sta->sae->tmp) { pos = mgmt->u.auth.variable; end = ((const u8 *) mgmt) + len; if (pos + sizeof(le16) > end) { wpa_printf(MSG_ERROR, "SAE: Too short anti-clogging token request"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto reply; } resp = sae_group_allowed(sta->sae, groups, WPA_GET_LE16(pos)); if (resp != WLAN_STATUS_SUCCESS) { wpa_printf(MSG_ERROR, "SAE: Invalid group in anti-clogging token request"); goto reply; } pos += sizeof(le16); wpabuf_free(sta->sae->tmp->anti_clogging_token); sta->sae->tmp->anti_clogging_token = wpabuf_alloc_copy(pos, end - pos); if (sta->sae->tmp->anti_clogging_token == NULL) { wpa_printf(MSG_ERROR, "SAE: Failed to alloc for anti-clogging token"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto remove_sta; } /* * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code * is 76, a new Commit Message shall be constructed * with the Anti-Clogging Token from the received * Authentication frame, and the commit-scalar and * COMMIT-ELEMENT previously sent. */ resp = auth_sae_send_commit(hapd, sta, mgmt->bssid, 0, status_code); if (resp != WLAN_STATUS_SUCCESS) { wpa_printf(MSG_ERROR, "SAE: Failed to send commit message"); goto remove_sta; } sae_set_state(sta, SAE_COMMITTED, "Sent Commit (anti-clogging token case in mesh)"); sta->sae->sync = 0; sae_set_retransmit_timer(hapd, sta); return; } if ((hapd->conf->mesh & MESH_ENABLED) && status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && sta->sae->tmp) { wpa_printf(MSG_DEBUG, "SAE: Peer did not accept our SAE group"); sae_pick_next_group(hapd, sta); goto remove_sta; } if (!sae_status_success(hapd, status_code)) goto remove_sta; if (!(hapd->conf->mesh & MESH_ENABLED) && sta->sae->state == SAE_COMMITTED) { /* This is needed in the infrastructure BSS case to * address a sequence where a STA entry may remain in * hostapd across two attempts to do SAE authentication * by the same STA. The second attempt may end up trying * to use a different group and that would not be * allowed if we remain in Committed state with the * previously set parameters. */ pos = mgmt->u.auth.variable; end = ((const u8 *) mgmt) + len; if (end - pos >= (int) sizeof(le16) && sae_group_allowed(sta->sae, groups, WPA_GET_LE16(pos)) == WLAN_STATUS_SUCCESS) { /* Do not waste resources deriving the same PWE * again since the same group is reused. */ sae_set_state(sta, SAE_NOTHING, "Allow previous PWE to be reused"); allow_reuse = 1; } else { sae_set_state(sta, SAE_NOTHING, "Clear existing state to allow restart"); sae_clear_data(sta->sae); } } resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable, ((const u8 *) mgmt) + len - mgmt->u.auth.variable, &token, &token_len, groups, status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT); if (resp == SAE_SILENTLY_DISCARD) { wpa_printf(MSG_DEBUG, "SAE: Drop commit message from " MACSTR " due to reflection attack", MAC2STR(sta->addr)); goto remove_sta; } if (resp == WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER) { wpa_msg(hapd->msg_ctx, MSG_INFO, WPA_EVENT_SAE_UNKNOWN_PASSWORD_IDENTIFIER MACSTR, MAC2STR(sta->addr)); sae_clear_retransmit_timer(hapd, sta); sae_set_state(sta, SAE_NOTHING, "Unknown Password Identifier"); goto remove_sta; } if (token && check_sae_token(hapd, sta->addr, token, token_len) < 0) { wpa_printf(MSG_DEBUG, "SAE: Drop commit message with " "incorrect token from " MACSTR, MAC2STR(sta->addr)); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto remove_sta; } if (resp != WLAN_STATUS_SUCCESS) goto reply; if (sta->sae->tmp && check_sae_rejected_groups( hapd, sta->sae->tmp->peer_rejected_groups)) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto reply; } if (!token && use_sae_anti_clogging(hapd) && !allow_reuse) { int h2e = 0; wpa_printf(MSG_DEBUG, "SAE: Request anti-clogging token from " MACSTR, MAC2STR(sta->addr)); if (sta->sae->tmp) h2e = sta->sae->tmp->h2e; if (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT) h2e = 1; data = auth_build_token_req(hapd, sta->sae->group, sta->addr, h2e); resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ; if (hapd->conf->mesh & MESH_ENABLED) sae_set_state(sta, SAE_NOTHING, "Request anti-clogging token case in mesh"); goto reply; } resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction, status_code, allow_reuse, &sta_removed); } else if (auth_transaction == 2) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "SAE authentication (RX confirm, status=%u (%s))", status_code, status2str(status_code)); if (status_code != WLAN_STATUS_SUCCESS) goto remove_sta; if (sta->sae->state >= SAE_CONFIRMED || !(hapd->conf->mesh & MESH_ENABLED)) { const u8 *var; size_t var_len; u16 peer_send_confirm; var = mgmt->u.auth.variable; var_len = ((u8 *) mgmt) + len - mgmt->u.auth.variable; if (var_len < 2) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto reply; } peer_send_confirm = WPA_GET_LE16(var); if (sta->sae->state == SAE_ACCEPTED && (peer_send_confirm <= sta->sae->rc || peer_send_confirm == 0xffff)) { wpa_printf(MSG_DEBUG, "SAE: Silently ignore unexpected Confirm from peer " MACSTR " (peer-send-confirm=%u Rc=%u)", MAC2STR(sta->addr), peer_send_confirm, sta->sae->rc); return; } if (sae_check_confirm(sta->sae, var, var_len) < 0) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto reply; } sta->sae->rc = peer_send_confirm; } resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction, status_code, 0, &sta_removed); } else { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "unexpected SAE authentication transaction %u (status=%u (%s))", auth_transaction, status_code, status2str(status_code)); if (status_code != WLAN_STATUS_SUCCESS) goto remove_sta; resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; } reply: if (!sta_removed && resp != WLAN_STATUS_SUCCESS) { pos = mgmt->u.auth.variable; end = ((const u8 *) mgmt) + len; /* Copy the Finite Cyclic Group field from the request if we * rejected it as unsupported group. */ if (resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && !data && end - pos >= 2) data = wpabuf_alloc_copy(pos, 2); sae_sme_send_external_auth_status(hapd, sta, resp); send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE, auth_transaction, resp, data ? wpabuf_head(data) : (u8 *) "", data ? wpabuf_len(data) : 0, "auth-sae"); } remove_sta: if (!sta_removed && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS || status_code != WLAN_STATUS_SUCCESS)) { hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; } wpabuf_free(data); } /** * auth_sae_init_committed - Send COMMIT and start SAE in committed state * @hapd: BSS data for the device initiating the authentication * @sta: the peer to which commit authentication frame is sent * * This function implements Init event handling (IEEE Std 802.11-2012, * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the * sta->sae structure should be initialized appropriately via a call to * sae_prepare_commit(). */ int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta) { int ret; if (!sta->sae || !sta->sae->tmp) return -1; if (sta->sae->state != SAE_NOTHING) return -1; ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0, -1); if (ret) return -1; sae_set_state(sta, SAE_COMMITTED, "Init and sent commit"); sta->sae->sync = 0; sae_set_retransmit_timer(hapd, sta); return 0; } void auth_sae_process_commit(void *eloop_ctx, void *user_ctx) { struct hostapd_data *hapd = eloop_ctx; struct hostapd_sae_commit_queue *q; unsigned int queue_len; q = dl_list_first(&hapd->sae_commit_queue, struct hostapd_sae_commit_queue, list); if (!q) return; wpa_printf(MSG_DEBUG, "SAE: Process next available message from queue"); dl_list_del(&q->list); handle_auth(hapd, (const struct ieee80211_mgmt *) q->msg, q->len, q->rssi, 1); os_free(q); if (eloop_is_timeout_registered(auth_sae_process_commit, hapd, NULL)) return; queue_len = dl_list_len(&hapd->sae_commit_queue); eloop_register_timeout(0, queue_len * 10000, auth_sae_process_commit, hapd, NULL); } static void auth_sae_queue(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int rssi) { struct hostapd_sae_commit_queue *q, *q2; unsigned int queue_len; const struct ieee80211_mgmt *mgmt2; queue_len = dl_list_len(&hapd->sae_commit_queue); if (queue_len >= 15) { wpa_printf(MSG_DEBUG, "SAE: No more room in message queue - drop the new frame from " MACSTR, MAC2STR(mgmt->sa)); return; } wpa_printf(MSG_DEBUG, "SAE: Queue Authentication message from " MACSTR " for processing (queue_len %u)", MAC2STR(mgmt->sa), queue_len); q = os_zalloc(sizeof(*q) + len); if (!q) return; q->rssi = rssi; q->len = len; os_memcpy(q->msg, mgmt, len); /* Check whether there is already a queued Authentication frame from the * same station with the same transaction number and if so, replace that * queue entry with the new one. This avoids issues with a peer that * sends multiple times (e.g., due to frequent SAE retries). There is no * point in us trying to process the old attempts after a new one has * obsoleted them. */ dl_list_for_each(q2, &hapd->sae_commit_queue, struct hostapd_sae_commit_queue, list) { mgmt2 = (const struct ieee80211_mgmt *) q2->msg; if (os_memcmp(mgmt->sa, mgmt2->sa, ETH_ALEN) == 0 && mgmt->u.auth.auth_transaction == mgmt2->u.auth.auth_transaction) { wpa_printf(MSG_DEBUG, "SAE: Replace queued message from same STA with same transaction number"); dl_list_add(&q2->list, &q->list); dl_list_del(&q2->list); os_free(q2); goto queued; } } /* No pending identical entry, so add to the end of the queue */ dl_list_add_tail(&hapd->sae_commit_queue, &q->list); queued: if (eloop_is_timeout_registered(auth_sae_process_commit, hapd, NULL)) return; eloop_register_timeout(0, queue_len * 10000, auth_sae_process_commit, hapd, NULL); } static int auth_sae_queued_addr(struct hostapd_data *hapd, const u8 *addr) { struct hostapd_sae_commit_queue *q; const struct ieee80211_mgmt *mgmt; dl_list_for_each(q, &hapd->sae_commit_queue, struct hostapd_sae_commit_queue, list) { mgmt = (const struct ieee80211_mgmt *) q->msg; if (os_memcmp(addr, mgmt->sa, ETH_ALEN) == 0) return 1; } return 0; } #endif /* CONFIG_SAE */ static u16 wpa_res_to_status_code(int res) { if (res == WPA_INVALID_GROUP) return WLAN_STATUS_GROUP_CIPHER_NOT_VALID; if (res == WPA_INVALID_PAIRWISE) return WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; if (res == WPA_INVALID_AKMP) return WLAN_STATUS_AKMP_NOT_VALID; if (res == WPA_ALLOC_FAIL) return WLAN_STATUS_UNSPECIFIED_FAILURE; if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; if (res == WPA_INVALID_MGMT_GROUP_CIPHER) return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; if (res == WPA_INVALID_MDIE) return WLAN_STATUS_INVALID_MDIE; if (res == WPA_INVALID_PMKID) return WLAN_STATUS_INVALID_PMKID; if (res != WPA_IE_OK) return WLAN_STATUS_INVALID_IE; return WLAN_STATUS_SUCCESS; } #ifdef CONFIG_FILS static void handle_auth_fils_finish(struct hostapd_data *hapd, struct sta_info *sta, u16 resp, struct wpabuf *data, int pub); void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta, const u8 *pos, size_t len, u16 auth_alg, u16 auth_transaction, u16 status_code, void (*cb)(struct hostapd_data *hapd, struct sta_info *sta, u16 resp, struct wpabuf *data, int pub)) { u16 resp = WLAN_STATUS_SUCCESS; const u8 *end; struct ieee802_11_elems elems; int res; struct wpa_ie_data rsn; struct rsn_pmksa_cache_entry *pmksa = NULL; if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS) return; end = pos + len; wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields", pos, end - pos); /* TODO: FILS PK */ #ifdef CONFIG_FILS_SK_PFS if (auth_alg == WLAN_AUTH_FILS_SK_PFS) { u16 group; struct wpabuf *pub; size_t elem_len; /* Using FILS PFS */ /* Finite Cyclic Group */ if (end - pos < 2) { wpa_printf(MSG_DEBUG, "FILS: No room for Finite Cyclic Group"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } group = WPA_GET_LE16(pos); pos += 2; if (group != hapd->conf->fils_dh_group) { wpa_printf(MSG_DEBUG, "FILS: Unsupported Finite Cyclic Group: %u (expected %u)", group, hapd->conf->fils_dh_group); resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED; goto fail; } crypto_ecdh_deinit(sta->fils_ecdh); sta->fils_ecdh = crypto_ecdh_init(group); if (!sta->fils_ecdh) { wpa_printf(MSG_INFO, "FILS: Could not initialize ECDH with group %d", group); resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED; goto fail; } pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1); if (!pub) { wpa_printf(MSG_DEBUG, "FILS: Failed to derive ECDH public key"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } elem_len = wpabuf_len(pub); wpabuf_free(pub); /* Element */ if ((size_t) (end - pos) < elem_len) { wpa_printf(MSG_DEBUG, "FILS: No room for Element"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpabuf_free(sta->fils_g_sta); sta->fils_g_sta = wpabuf_alloc_copy(pos, elem_len); wpabuf_clear_free(sta->fils_dh_ss); sta->fils_dh_ss = crypto_ecdh_set_peerkey(sta->fils_ecdh, 1, pos, elem_len); if (!sta->fils_dh_ss) { wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", sta->fils_dh_ss); pos += elem_len; } else { crypto_ecdh_deinit(sta->fils_ecdh); sta->fils_ecdh = NULL; wpabuf_clear_free(sta->fils_dh_ss); sta->fils_dh_ss = NULL; } #endif /* CONFIG_FILS_SK_PFS */ wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos); if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) { wpa_printf(MSG_DEBUG, "FILS: Could not parse elements"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } /* RSNE */ wpa_hexdump(MSG_DEBUG, "FILS: RSN element", elems.rsn_ie, elems.rsn_ie_len); if (!elems.rsn_ie || wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, &rsn) < 0) { wpa_printf(MSG_DEBUG, "FILS: No valid RSN element"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (!sta->wpa_sm) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); if (!sta->wpa_sm) { wpa_printf(MSG_DEBUG, "FILS: Failed to initialize RSN state machine"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, hapd->iface->freq, elems.rsn_ie - 2, elems.rsn_ie_len + 2, elems.rsnxe ? elems.rsnxe - 2 : NULL, elems.rsnxe ? elems.rsnxe_len + 2 : 0, elems.mdie, elems.mdie_len, NULL, 0); resp = wpa_res_to_status_code(res); if (resp != WLAN_STATUS_SUCCESS) goto fail; if (!elems.fils_nonce) { wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpa_hexdump(MSG_DEBUG, "FILS: SNonce", elems.fils_nonce, FILS_NONCE_LEN); os_memcpy(sta->fils_snonce, elems.fils_nonce, FILS_NONCE_LEN); /* PMKID List */ if (rsn.pmkid && rsn.num_pmkid > 0) { u8 num; const u8 *pmkid; wpa_hexdump(MSG_DEBUG, "FILS: PMKID List", rsn.pmkid, rsn.num_pmkid * PMKID_LEN); pmkid = rsn.pmkid; num = rsn.num_pmkid; while (num) { wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN); pmksa = wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr, pmkid); if (pmksa) break; pmksa = wpa_auth_pmksa_get_fils_cache_id(hapd->wpa_auth, sta->addr, pmkid); if (pmksa) break; pmkid += PMKID_LEN; num--; } } if (pmksa && wpa_auth_sta_key_mgmt(sta->wpa_sm) != pmksa->akmp) { wpa_printf(MSG_DEBUG, "FILS: Matching PMKSA cache entry has different AKMP (0x%x != 0x%x) - ignore", wpa_auth_sta_key_mgmt(sta->wpa_sm), pmksa->akmp); pmksa = NULL; } if (pmksa) wpa_printf(MSG_DEBUG, "FILS: Found matching PMKSA cache entry"); /* FILS Session */ if (!elems.fils_session) { wpa_printf(MSG_DEBUG, "FILS: No FILS Session element"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session, FILS_SESSION_LEN); os_memcpy(sta->fils_session, elems.fils_session, FILS_SESSION_LEN); /* Wrapped Data */ if (elems.wrapped_data) { wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data", elems.wrapped_data, elems.wrapped_data_len); if (!pmksa) { #ifndef CONFIG_NO_RADIUS if (!sta->eapol_sm) { sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta); } wpa_printf(MSG_DEBUG, "FILS: Forward EAP-Initiate/Re-auth to authentication server"); ieee802_1x_encapsulate_radius( hapd, sta, elems.wrapped_data, elems.wrapped_data_len); sta->fils_pending_cb = cb; wpa_printf(MSG_DEBUG, "FILS: Will send Authentication frame once the response from authentication server is available"); sta->flags |= WLAN_STA_PENDING_FILS_ERP; /* Calculate pending PMKID here so that we do not need * to maintain a copy of the EAP-Initiate/Reauth * message. */ if (fils_pmkid_erp(wpa_auth_sta_key_mgmt(sta->wpa_sm), elems.wrapped_data, elems.wrapped_data_len, sta->fils_erp_pmkid) == 0) sta->fils_erp_pmkid_set = 1; return; #else /* CONFIG_NO_RADIUS */ resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; #endif /* CONFIG_NO_RADIUS */ } } fail: if (cb) { struct wpabuf *data; int pub = 0; data = prepare_auth_resp_fils(hapd, sta, &resp, pmksa, NULL, NULL, 0, &pub); if (!data) { wpa_printf(MSG_DEBUG, "%s: prepare_auth_resp_fils() returned failure", __func__); } cb(hapd, sta, resp, data, pub); } } static struct wpabuf * prepare_auth_resp_fils(struct hostapd_data *hapd, struct sta_info *sta, u16 *resp, struct rsn_pmksa_cache_entry *pmksa, struct wpabuf *erp_resp, const u8 *msk, size_t msk_len, int *is_pub) { u8 fils_nonce[FILS_NONCE_LEN]; size_t ielen; struct wpabuf *data = NULL; const u8 *ie; u8 *ie_buf = NULL; const u8 *pmk = NULL; size_t pmk_len = 0; u8 pmk_buf[PMK_LEN_MAX]; struct wpabuf *pub = NULL; if (*resp != WLAN_STATUS_SUCCESS) goto fail; ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen); if (!ie) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (pmksa) { /* Add PMKID of the selected PMKSA into RSNE */ ie_buf = os_malloc(ielen + 2 + 2 + PMKID_LEN); if (!ie_buf) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } os_memcpy(ie_buf, ie, ielen); if (wpa_insert_pmkid(ie_buf, &ielen, pmksa->pmkid) < 0) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } ie = ie_buf; } if (random_get_bytes(fils_nonce, FILS_NONCE_LEN) < 0) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpa_hexdump(MSG_DEBUG, "RSN: Generated FILS Nonce", fils_nonce, FILS_NONCE_LEN); #ifdef CONFIG_FILS_SK_PFS if (sta->fils_dh_ss && sta->fils_ecdh) { pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1); if (!pub) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } } #endif /* CONFIG_FILS_SK_PFS */ data = wpabuf_alloc(1000 + ielen + (pub ? wpabuf_len(pub) : 0)); if (!data) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } /* TODO: FILS PK */ #ifdef CONFIG_FILS_SK_PFS if (pub) { /* Finite Cyclic Group */ wpabuf_put_le16(data, hapd->conf->fils_dh_group); /* Element */ wpabuf_put_buf(data, pub); } #endif /* CONFIG_FILS_SK_PFS */ /* RSNE */ wpabuf_put_data(data, ie, ielen); /* MDE when using FILS+FT (already included in ie,ielen with RSNE) */ #ifdef CONFIG_IEEE80211R_AP if (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm))) { /* FTE[R1KH-ID,R0KH-ID] when using FILS+FT */ int res; int use_sha384 = wpa_key_mgmt_sha384( wpa_auth_sta_key_mgmt(sta->wpa_sm)); res = wpa_auth_write_fte(hapd->wpa_auth, use_sha384, wpabuf_put(data, 0), wpabuf_tailroom(data)); if (res < 0) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpabuf_put(data, res); } #endif /* CONFIG_IEEE80211R_AP */ /* FILS Nonce */ wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */ wpabuf_put_u8(data, 1 + FILS_NONCE_LEN); /* Length */ /* Element ID Extension */ wpabuf_put_u8(data, WLAN_EID_EXT_FILS_NONCE); wpabuf_put_data(data, fils_nonce, FILS_NONCE_LEN); /* FILS Session */ wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */ wpabuf_put_u8(data, 1 + FILS_SESSION_LEN); /* Length */ /* Element ID Extension */ wpabuf_put_u8(data, WLAN_EID_EXT_FILS_SESSION); wpabuf_put_data(data, sta->fils_session, FILS_SESSION_LEN); /* Wrapped Data */ if (!pmksa && erp_resp) { wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */ wpabuf_put_u8(data, 1 + wpabuf_len(erp_resp)); /* Length */ /* Element ID Extension */ wpabuf_put_u8(data, WLAN_EID_EXT_WRAPPED_DATA); wpabuf_put_buf(data, erp_resp); if (fils_rmsk_to_pmk(wpa_auth_sta_key_mgmt(sta->wpa_sm), msk, msk_len, sta->fils_snonce, fils_nonce, sta->fils_dh_ss ? wpabuf_head(sta->fils_dh_ss) : NULL, sta->fils_dh_ss ? wpabuf_len(sta->fils_dh_ss) : 0, pmk_buf, &pmk_len)) { wpa_printf(MSG_DEBUG, "FILS: Failed to derive PMK"); *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; wpabuf_free(data); data = NULL; goto fail; } pmk = pmk_buf; /* Don't use DHss in PTK derivation if PMKSA caching is not * used. */ wpabuf_clear_free(sta->fils_dh_ss); sta->fils_dh_ss = NULL; if (sta->fils_erp_pmkid_set) { /* TODO: get PMKLifetime from WPA parameters */ unsigned int dot11RSNAConfigPMKLifetime = 43200; int session_timeout; session_timeout = dot11RSNAConfigPMKLifetime; if (sta->session_timeout_set) { struct os_reltime now, diff; os_get_reltime(&now); os_reltime_sub(&sta->session_timeout, &now, &diff); session_timeout = diff.sec; } sta->fils_erp_pmkid_set = 0; wpa_auth_add_fils_pmk_pmkid(sta->wpa_sm, pmk, pmk_len, sta->fils_erp_pmkid); if (!hapd->conf->disable_pmksa_caching && wpa_auth_pmksa_add2( hapd->wpa_auth, sta->addr, pmk, pmk_len, sta->fils_erp_pmkid, session_timeout, wpa_auth_sta_key_mgmt(sta->wpa_sm)) < 0) { wpa_printf(MSG_ERROR, "FILS: Failed to add PMKSA cache entry based on ERP"); } } } else if (pmksa) { pmk = pmksa->pmk; pmk_len = pmksa->pmk_len; } if (!pmk) { wpa_printf(MSG_DEBUG, "FILS: No PMK available"); *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; wpabuf_free(data); data = NULL; goto fail; } if (fils_auth_pmk_to_ptk(sta->wpa_sm, pmk, pmk_len, sta->fils_snonce, fils_nonce, sta->fils_dh_ss ? wpabuf_head(sta->fils_dh_ss) : NULL, sta->fils_dh_ss ? wpabuf_len(sta->fils_dh_ss) : 0, sta->fils_g_sta, pub) < 0) { *resp = WLAN_STATUS_UNSPECIFIED_FAILURE; wpabuf_free(data); data = NULL; goto fail; } fail: if (is_pub) *is_pub = pub != NULL; os_free(ie_buf); wpabuf_free(pub); wpabuf_clear_free(sta->fils_dh_ss); sta->fils_dh_ss = NULL; #ifdef CONFIG_FILS_SK_PFS crypto_ecdh_deinit(sta->fils_ecdh); sta->fils_ecdh = NULL; #endif /* CONFIG_FILS_SK_PFS */ return data; } static void handle_auth_fils_finish(struct hostapd_data *hapd, struct sta_info *sta, u16 resp, struct wpabuf *data, int pub) { u16 auth_alg; auth_alg = (pub || resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK; send_auth_reply(hapd, sta, sta->addr, hapd->own_addr, auth_alg, 2, resp, data ? wpabuf_head(data) : (u8 *) "", data ? wpabuf_len(data) : 0, "auth-fils-finish"); wpabuf_free(data); if (resp == WLAN_STATUS_SUCCESS) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (FILS)"); sta->flags |= WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); sta->auth_alg = pub ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK; mlme_authenticate_indication(hapd, sta); } } void ieee802_11_finish_fils_auth(struct hostapd_data *hapd, struct sta_info *sta, int success, struct wpabuf *erp_resp, const u8 *msk, size_t msk_len) { struct wpabuf *data; int pub = 0; u16 resp; sta->flags &= ~WLAN_STA_PENDING_FILS_ERP; if (!sta->fils_pending_cb) return; resp = success ? WLAN_STATUS_SUCCESS : WLAN_STATUS_UNSPECIFIED_FAILURE; data = prepare_auth_resp_fils(hapd, sta, &resp, NULL, erp_resp, msk, msk_len, &pub); if (!data) { wpa_printf(MSG_DEBUG, "%s: prepare_auth_resp_fils() returned failure", __func__); } sta->fils_pending_cb(hapd, sta, resp, data, pub); } #endif /* CONFIG_FILS */ static int ieee802_11_allowed_address(struct hostapd_data *hapd, const u8 *addr, const u8 *msg, size_t len, struct radius_sta *info) { int res; res = hostapd_allowed_address(hapd, addr, msg, len, info, 0); if (res == HOSTAPD_ACL_REJECT) { wpa_printf(MSG_DEBUG, "Station " MACSTR " not allowed to authenticate", MAC2STR(addr)); return HOSTAPD_ACL_REJECT; } if (res == HOSTAPD_ACL_PENDING) { wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR " waiting for an external authentication", MAC2STR(addr)); /* Authentication code will re-send the authentication frame * after it has received (and cached) information from the * external source. */ return HOSTAPD_ACL_PENDING; } return res; } static int ieee802_11_set_radius_info(struct hostapd_data *hapd, struct sta_info *sta, int res, struct radius_sta *info) { u32 session_timeout = info->session_timeout; u32 acct_interim_interval = info->acct_interim_interval; struct vlan_description *vlan_id = &info->vlan_id; struct hostapd_sta_wpa_psk_short *psk = info->psk; char *identity = info->identity; char *radius_cui = info->radius_cui; if (vlan_id->notempty && !hostapd_vlan_valid(hapd->conf->vlan, vlan_id)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, HOSTAPD_LEVEL_INFO, "Invalid VLAN %d%s received from RADIUS server", vlan_id->untagged, vlan_id->tagged[0] ? "+" : ""); return -1; } if (ap_sta_set_vlan(hapd, sta, vlan_id) < 0) return -1; if (sta->vlan_id) hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS, HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id); hostapd_free_psk_list(sta->psk); if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) hostapd_copy_psk_list(&sta->psk, psk); else sta->psk = NULL; os_free(sta->identity); if (identity) sta->identity = os_strdup(identity); else sta->identity = NULL; os_free(sta->radius_cui); if (radius_cui) sta->radius_cui = os_strdup(radius_cui); else sta->radius_cui = NULL; if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval) sta->acct_interim_interval = acct_interim_interval; if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) { sta->session_timeout_set = 1; os_get_reltime(&sta->session_timeout); sta->session_timeout.sec += session_timeout; ap_sta_session_timeout(hapd, sta, session_timeout); } else { sta->session_timeout_set = 0; ap_sta_no_session_timeout(hapd, sta); } return 0; } static void handle_auth(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int rssi, int from_queue) { u16 auth_alg, auth_transaction, status_code; u16 resp = WLAN_STATUS_SUCCESS; struct sta_info *sta = NULL; int res, reply_res; u16 fc; const u8 *challenge = NULL; u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; size_t resp_ies_len = 0; u16 seq_ctrl; struct radius_sta rad_info; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)", (unsigned long) len); return; } #ifdef CONFIG_TESTING_OPTIONS if (hapd->iconf->ignore_auth_probability > 0.0 && drand48() < hapd->iconf->ignore_auth_probability) { wpa_printf(MSG_INFO, "TESTING: ignoring auth frame from " MACSTR, MAC2STR(mgmt->sa)); return; } #endif /* CONFIG_TESTING_OPTIONS */ auth_alg = le_to_host16(mgmt->u.auth.auth_alg); auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); status_code = le_to_host16(mgmt->u.auth.status_code); fc = le_to_host16(mgmt->frame_control); seq_ctrl = le_to_host16(mgmt->seq_ctrl); if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 2 + WLAN_AUTH_CHALLENGE_LEN && mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE && mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN) challenge = &mgmt->u.auth.variable[2]; wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d " "auth_transaction=%d status_code=%d wep=%d%s " "seq_ctrl=0x%x%s%s", MAC2STR(mgmt->sa), auth_alg, auth_transaction, status_code, !!(fc & WLAN_FC_ISWEP), challenge ? " challenge" : "", seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "", from_queue ? " (from queue)" : ""); #ifdef CONFIG_NO_RC4 if (auth_alg == WLAN_AUTH_SHARED_KEY) { wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)", auth_alg); resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; goto fail; } #endif /* CONFIG_NO_RC4 */ if (hapd->tkip_countermeasures) { wpa_printf(MSG_DEBUG, "Ongoing TKIP countermeasures (Michael MIC failure) - reject authentication"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) && auth_alg == WLAN_AUTH_OPEN) || #ifdef CONFIG_IEEE80211R_AP (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) && auth_alg == WLAN_AUTH_FT) || #endif /* CONFIG_IEEE80211R_AP */ #ifdef CONFIG_SAE (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) && auth_alg == WLAN_AUTH_SAE) || #endif /* CONFIG_SAE */ #ifdef CONFIG_FILS (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) && auth_alg == WLAN_AUTH_FILS_SK) || (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) && hapd->conf->fils_dh_group && auth_alg == WLAN_AUTH_FILS_SK_PFS) || #endif /* CONFIG_FILS */ ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) && auth_alg == WLAN_AUTH_SHARED_KEY))) { wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)", auth_alg); resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; goto fail; } if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE || (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) { wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)", auth_transaction); resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION; goto fail; } if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate", MAC2STR(mgmt->sa)); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (hapd->conf->no_auth_if_seen_on) { struct hostapd_data *other; other = sta_track_seen_on(hapd->iface, mgmt->sa, hapd->conf->no_auth_if_seen_on); if (other) { u8 *pos; u32 info; u8 op_class, channel, phytype; wpa_printf(MSG_DEBUG, "%s: Reject authentication from " MACSTR " since STA has been seen on %s", hapd->conf->iface, MAC2STR(mgmt->sa), hapd->conf->no_auth_if_seen_on); resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION; pos = &resp_ies[0]; *pos++ = WLAN_EID_NEIGHBOR_REPORT; *pos++ = 13; os_memcpy(pos, other->own_addr, ETH_ALEN); pos += ETH_ALEN; info = 0; /* TODO: BSSID Information */ WPA_PUT_LE32(pos, info); pos += 4; if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD) phytype = 8; /* dmg */ else if (other->iconf->ieee80211ac) phytype = 9; /* vht */ else if (other->iconf->ieee80211n) phytype = 7; /* ht */ else if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211A) phytype = 4; /* ofdm */ else if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211G) phytype = 6; /* erp */ else phytype = 5; /* hrdsss */ if (ieee80211_freq_to_channel_ext( hostapd_hw_get_freq(other, other->iconf->channel), other->iconf->secondary_channel, other->iconf->ieee80211ac, &op_class, &channel) == NUM_HOSTAPD_MODES) { op_class = 0; channel = other->iconf->channel; } *pos++ = op_class; *pos++ = channel; *pos++ = phytype; resp_ies_len = pos - &resp_ies[0]; goto fail; } } res = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len, &rad_info); if (res == HOSTAPD_ACL_REJECT) { wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Ignore Authentication frame from " MACSTR " due to ACL reject", MAC2STR(mgmt->sa)); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (res == HOSTAPD_ACL_PENDING) return; #ifdef CONFIG_SAE if (auth_alg == WLAN_AUTH_SAE && !from_queue && (auth_transaction == 1 || (auth_transaction == 2 && auth_sae_queued_addr(hapd, mgmt->sa)))) { /* Handle SAE Authentication commit message through a queue to * provide more control for postponing the needed heavy * processing under a possible DoS attack scenario. In addition, * queue SAE Authentication confirm message if there happens to * be a queued commit message from the same peer. This is needed * to avoid reordering Authentication frames within the same * SAE exchange. */ auth_sae_queue(hapd, mgmt, len, rssi); return; } #endif /* CONFIG_SAE */ sta = ap_get_sta(hapd, mgmt->sa); if (sta) { sta->flags &= ~WLAN_STA_PENDING_FILS_ERP; sta->ft_over_ds = 0; if ((fc & WLAN_FC_RETRY) && sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ && sta->last_seq_ctrl == seq_ctrl && sta->last_subtype == WLAN_FC_STYPE_AUTH) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Drop repeated authentication frame seq_ctrl=0x%x", seq_ctrl); return; } #ifdef CONFIG_MESH if ((hapd->conf->mesh & MESH_ENABLED) && sta->plink_state == PLINK_BLOCKED) { wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR " is blocked - drop Authentication frame", MAC2STR(mgmt->sa)); return; } #endif /* CONFIG_MESH */ } else { #ifdef CONFIG_MESH if (hapd->conf->mesh & MESH_ENABLED) { /* if the mesh peer is not available, we don't do auth. */ wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR " not yet known - drop Authentication frame", MAC2STR(mgmt->sa)); /* * Save a copy of the frame so that it can be processed * if a new peer entry is added shortly after this. */ wpabuf_free(hapd->mesh_pending_auth); hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len); os_get_reltime(&hapd->mesh_pending_auth_time); return; } #endif /* CONFIG_MESH */ sta = ap_sta_add(hapd, mgmt->sa); if (!sta) { wpa_printf(MSG_DEBUG, "ap_sta_add() failed"); resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; goto fail; } } sta->last_seq_ctrl = seq_ctrl; sta->last_subtype = WLAN_FC_STYPE_AUTH; #ifdef CONFIG_MBO sta->auth_rssi = rssi; #endif /* CONFIG_MBO */ res = ieee802_11_set_radius_info(hapd, sta, res, &rad_info); if (res) { wpa_printf(MSG_DEBUG, "ieee802_11_set_radius_info() failed"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } sta->flags &= ~WLAN_STA_PREAUTH; ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); /* * If the driver supports full AP client state, add a station to the * driver before sending authentication reply to make sure the driver * has resources, and not to go through the entire authentication and * association handshake, and fail it at the end. * * If this is not the first transaction, in a multi-step authentication * algorithm, the station already exists in the driver * (sta->added_unassoc = 1) so skip it. * * In mesh mode, the station was already added to the driver when the * NEW_PEER_CANDIDATE event is received. * * If PMF was negotiated for the existing association, skip this to * avoid dropping the STA entry and the associated keys. This is needed * to allow the original connection work until the attempt can complete * (re)association, so that unprotected Authentication frame cannot be * used to bypass PMF protection. */ if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) && (!(sta->flags & WLAN_STA_MFP) || !ap_sta_is_authorized(sta)) && !(hapd->conf->mesh & MESH_ENABLED) && !(sta->added_unassoc)) { /* * If a station that is already associated to the AP, is trying * to authenticate again, remove the STA entry, in order to make * sure the STA PS state gets cleared and configuration gets * updated. To handle this, station's added_unassoc flag is * cleared once the station has completed association. */ ap_sta_set_authorized(hapd, sta, 0); hostapd_drv_sta_remove(hapd, sta->addr); sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_AUTH | WLAN_STA_AUTHORIZED); if (hostapd_sta_add(hapd, sta->addr, 0, 0, sta->supported_rates, sta->supported_rates_len, 0, NULL, NULL, NULL, 0, sta->flags, 0, 0, 0, 0)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE, "Could not add STA to kernel driver"); resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; goto fail; } sta->added_unassoc = 1; } switch (auth_alg) { case WLAN_AUTH_OPEN: hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "authentication OK (open system)"); sta->flags |= WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); sta->auth_alg = WLAN_AUTH_OPEN; mlme_authenticate_indication(hapd, sta); break; #ifdef CONFIG_WEP #ifndef CONFIG_NO_RC4 case WLAN_AUTH_SHARED_KEY: resp = auth_shared_key(hapd, sta, auth_transaction, challenge, fc & WLAN_FC_ISWEP); if (resp != 0) wpa_printf(MSG_DEBUG, "auth_shared_key() failed: status=%d", resp); sta->auth_alg = WLAN_AUTH_SHARED_KEY; mlme_authenticate_indication(hapd, sta); if (sta->challenge && auth_transaction == 1) { resp_ies[0] = WLAN_EID_CHALLENGE; resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN; os_memcpy(resp_ies + 2, sta->challenge, WLAN_AUTH_CHALLENGE_LEN); resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN; } break; #endif /* CONFIG_NO_RC4 */ #endif /* CONFIG_WEP */ #ifdef CONFIG_IEEE80211R_AP case WLAN_AUTH_FT: sta->auth_alg = WLAN_AUTH_FT; if (sta->wpa_sm == NULL) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); if (sta->wpa_sm == NULL) { wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " "state machine"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid, auth_transaction, mgmt->u.auth.variable, len - IEEE80211_HDRLEN - sizeof(mgmt->u.auth), handle_auth_ft_finish, hapd); /* handle_auth_ft_finish() callback will complete auth. */ return; #endif /* CONFIG_IEEE80211R_AP */ #ifdef CONFIG_SAE case WLAN_AUTH_SAE: #ifdef CONFIG_MESH if (status_code == WLAN_STATUS_SUCCESS && hapd->conf->mesh & MESH_ENABLED) { if (sta->wpa_sm == NULL) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); if (sta->wpa_sm == NULL) { wpa_printf(MSG_DEBUG, "SAE: Failed to initialize WPA state machine"); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } } #endif /* CONFIG_MESH */ handle_auth_sae(hapd, sta, mgmt, len, auth_transaction, status_code); return; #endif /* CONFIG_SAE */ #ifdef CONFIG_FILS case WLAN_AUTH_FILS_SK: case WLAN_AUTH_FILS_SK_PFS: handle_auth_fils(hapd, sta, mgmt->u.auth.variable, len - IEEE80211_HDRLEN - sizeof(mgmt->u.auth), auth_alg, auth_transaction, status_code, handle_auth_fils_finish); return; #endif /* CONFIG_FILS */ } fail: reply_res = send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, auth_alg, auth_transaction + 1, resp, resp_ies, resp_ies_len, "handle-auth"); if (sta && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS || reply_res != WLAN_STATUS_SUCCESS)) { hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; } } int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta) { int i, j = 32, aid; /* get a unique AID */ if (sta->aid > 0) { wpa_printf(MSG_DEBUG, " old AID %d", sta->aid); return 0; } if (TEST_FAIL()) return -1; for (i = 0; i < AID_WORDS; i++) { if (hapd->sta_aid[i] == (u32) -1) continue; for (j = 0; j < 32; j++) { if (!(hapd->sta_aid[i] & BIT(j))) break; } if (j < 32) break; } if (j == 32) return -1; aid = i * 32 + j + 1; if (aid > 2007) return -1; sta->aid = aid; hapd->sta_aid[i] |= BIT(j); wpa_printf(MSG_DEBUG, " new AID %d", sta->aid); return 0; } static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta, const u8 *ssid_ie, size_t ssid_ie_len) { if (ssid_ie == NULL) return WLAN_STATUS_UNSPECIFIED_FAILURE; if (ssid_ie_len != hapd->conf->ssid.ssid_len || os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station tried to associate with unknown SSID " "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len)); return WLAN_STATUS_UNSPECIFIED_FAILURE; } return WLAN_STATUS_SUCCESS; } static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta, const u8 *wmm_ie, size_t wmm_ie_len) { sta->flags &= ~WLAN_STA_WMM; sta->qosinfo = 0; if (wmm_ie && hapd->conf->wmm_enabled) { struct wmm_information_element *wmm; if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA, HOSTAPD_LEVEL_DEBUG, "invalid WMM element in association " "request"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } sta->flags |= WLAN_STA_WMM; wmm = (struct wmm_information_element *) wmm_ie; sta->qosinfo = wmm->qos_info; } return WLAN_STATUS_SUCCESS; } static u16 check_multi_ap(struct hostapd_data *hapd, struct sta_info *sta, const u8 *multi_ap_ie, size_t multi_ap_len) { u8 multi_ap_value = 0; sta->flags &= ~WLAN_STA_MULTI_AP; if (!hapd->conf->multi_ap) return WLAN_STATUS_SUCCESS; if (multi_ap_ie) { const u8 *multi_ap_subelem; multi_ap_subelem = get_ie(multi_ap_ie + 4, multi_ap_len - 4, MULTI_AP_SUB_ELEM_TYPE); if (multi_ap_subelem && multi_ap_subelem[1] == 1) { multi_ap_value = multi_ap_subelem[2]; } else { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Multi-AP IE has missing or invalid Multi-AP subelement"); return WLAN_STATUS_INVALID_IE; } } if (multi_ap_value && multi_ap_value != MULTI_AP_BACKHAUL_STA) hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Multi-AP IE with unexpected value 0x%02x", multi_ap_value); if (!(multi_ap_value & MULTI_AP_BACKHAUL_STA)) { if (hapd->conf->multi_ap & FRONTHAUL_BSS) return WLAN_STATUS_SUCCESS; hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Non-Multi-AP STA tries to associate with backhaul-only BSS"); return WLAN_STATUS_ASSOC_DENIED_UNSPEC; } if (!(hapd->conf->multi_ap & BACKHAUL_BSS)) hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Backhaul STA tries to associate with fronthaul-only BSS"); sta->flags |= WLAN_STA_MULTI_AP; return WLAN_STATUS_SUCCESS; } static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta, struct ieee802_11_elems *elems) { /* Supported rates not used in IEEE 802.11ad/DMG */ if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) return WLAN_STATUS_SUCCESS; if (!elems->supp_rates) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "No supported rates element in AssocReq"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } if (elems->supp_rates_len + elems->ext_supp_rates_len > sizeof(sta->supported_rates)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Invalid supported rates element length %d+%d", elems->supp_rates_len, elems->ext_supp_rates_len); return WLAN_STATUS_UNSPECIFIED_FAILURE; } sta->supported_rates_len = merge_byte_arrays( sta->supported_rates, sizeof(sta->supported_rates), elems->supp_rates, elems->supp_rates_len, elems->ext_supp_rates, elems->ext_supp_rates_len); return WLAN_STATUS_SUCCESS; } static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta, const u8 *ext_capab_ie, size_t ext_capab_ie_len) { #ifdef CONFIG_INTERWORKING /* check for QoS Map support */ if (ext_capab_ie_len >= 5) { if (ext_capab_ie[4] & 0x01) sta->qos_map_enabled = 1; } #endif /* CONFIG_INTERWORKING */ if (ext_capab_ie_len > 0) { sta->ecsa_supported = !!(ext_capab_ie[0] & BIT(2)); os_free(sta->ext_capability); sta->ext_capability = os_malloc(1 + ext_capab_ie_len); if (sta->ext_capability) { sta->ext_capability[0] = ext_capab_ie_len; os_memcpy(sta->ext_capability + 1, ext_capab_ie, ext_capab_ie_len); } } return WLAN_STATUS_SUCCESS; } #ifdef CONFIG_OWE static int owe_group_supported(struct hostapd_data *hapd, u16 group) { int i; int *groups = hapd->conf->owe_groups; if (group != 19 && group != 20 && group != 21) return 0; if (!groups) return 1; for (i = 0; groups[i] > 0; i++) { if (groups[i] == group) return 1; } return 0; } static u16 owe_process_assoc_req(struct hostapd_data *hapd, struct sta_info *sta, const u8 *owe_dh, u8 owe_dh_len) { struct wpabuf *secret, *pub, *hkey; int res; u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN]; const char *info = "OWE Key Generation"; const u8 *addr[2]; size_t len[2]; u16 group; size_t hash_len, prime_len; if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) { wpa_printf(MSG_DEBUG, "OWE: Using PMKSA caching"); return WLAN_STATUS_SUCCESS; } group = WPA_GET_LE16(owe_dh); if (!owe_group_supported(hapd, group)) { wpa_printf(MSG_DEBUG, "OWE: Unsupported DH group %u", group); return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED; } if (group == 19) prime_len = 32; else if (group == 20) prime_len = 48; else if (group == 21) prime_len = 66; else return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED; crypto_ecdh_deinit(sta->owe_ecdh); sta->owe_ecdh = crypto_ecdh_init(group); if (!sta->owe_ecdh) return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED; sta->owe_group = group; secret = crypto_ecdh_set_peerkey(sta->owe_ecdh, 0, owe_dh + 2, owe_dh_len - 2); secret = wpabuf_zeropad(secret, prime_len); if (!secret) { wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret); /* prk = HKDF-extract(C | A | group, z) */ pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0); if (!pub) { wpabuf_clear_free(secret); return WLAN_STATUS_UNSPECIFIED_FAILURE; } /* PMKID = Truncate-128(Hash(C | A)) */ addr[0] = owe_dh + 2; len[0] = owe_dh_len - 2; addr[1] = wpabuf_head(pub); len[1] = wpabuf_len(pub); if (group == 19) { res = sha256_vector(2, addr, len, pmkid); hash_len = SHA256_MAC_LEN; } else if (group == 20) { res = sha384_vector(2, addr, len, pmkid); hash_len = SHA384_MAC_LEN; } else if (group == 21) { res = sha512_vector(2, addr, len, pmkid); hash_len = SHA512_MAC_LEN; } else { wpabuf_free(pub); wpabuf_clear_free(secret); return WLAN_STATUS_UNSPECIFIED_FAILURE; } pub = wpabuf_zeropad(pub, prime_len); if (res < 0 || !pub) { wpabuf_free(pub); wpabuf_clear_free(secret); return WLAN_STATUS_UNSPECIFIED_FAILURE; } hkey = wpabuf_alloc(owe_dh_len - 2 + wpabuf_len(pub) + 2); if (!hkey) { wpabuf_free(pub); wpabuf_clear_free(secret); return WLAN_STATUS_UNSPECIFIED_FAILURE; } wpabuf_put_data(hkey, owe_dh + 2, owe_dh_len - 2); /* C */ wpabuf_put_buf(hkey, pub); /* A */ wpabuf_free(pub); wpabuf_put_le16(hkey, group); /* group */ if (group == 19) res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey), wpabuf_head(secret), wpabuf_len(secret), prk); else if (group == 20) res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey), wpabuf_head(secret), wpabuf_len(secret), prk); else if (group == 21) res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey), wpabuf_head(secret), wpabuf_len(secret), prk); wpabuf_clear_free(hkey); wpabuf_clear_free(secret); if (res < 0) return WLAN_STATUS_UNSPECIFIED_FAILURE; wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len); /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */ os_free(sta->owe_pmk); sta->owe_pmk = os_malloc(hash_len); if (!sta->owe_pmk) { os_memset(prk, 0, SHA512_MAC_LEN); return WLAN_STATUS_UNSPECIFIED_FAILURE; } if (group == 19) res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info, os_strlen(info), sta->owe_pmk, hash_len); else if (group == 20) res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info, os_strlen(info), sta->owe_pmk, hash_len); else if (group == 21) res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info, os_strlen(info), sta->owe_pmk, hash_len); os_memset(prk, 0, SHA512_MAC_LEN); if (res < 0) { os_free(sta->owe_pmk); sta->owe_pmk = NULL; return WLAN_STATUS_UNSPECIFIED_FAILURE; } sta->owe_pmk_len = hash_len; wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sta->owe_pmk, sta->owe_pmk_len); wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN); wpa_auth_pmksa_add2(hapd->wpa_auth, sta->addr, sta->owe_pmk, sta->owe_pmk_len, pmkid, 0, WPA_KEY_MGMT_OWE); return WLAN_STATUS_SUCCESS; } u16 owe_validate_request(struct hostapd_data *hapd, const u8 *peer, const u8 *rsn_ie, size_t rsn_ie_len, const u8 *owe_dh, size_t owe_dh_len) { struct wpa_ie_data data; int res; if (!rsn_ie || rsn_ie_len < 2) { wpa_printf(MSG_DEBUG, "OWE: Invalid RSNE from " MACSTR, MAC2STR(peer)); return WLAN_STATUS_INVALID_IE; } rsn_ie -= 2; rsn_ie_len += 2; res = wpa_parse_wpa_ie_rsn(rsn_ie, rsn_ie_len, &data); if (res) { wpa_printf(MSG_DEBUG, "Failed to parse RSNE from " MACSTR " (res=%d)", MAC2STR(peer), res); wpa_hexdump(MSG_DEBUG, "RSNE", rsn_ie, rsn_ie_len); return wpa_res_to_status_code(res); } if (!(data.key_mgmt & WPA_KEY_MGMT_OWE)) { wpa_printf(MSG_DEBUG, "OWE: Unexpected key mgmt 0x%x from " MACSTR, (unsigned int) data.key_mgmt, MAC2STR(peer)); return WLAN_STATUS_AKMP_NOT_VALID; } if (!owe_dh) { wpa_printf(MSG_DEBUG, "OWE: No Diffie-Hellman Parameter element from " MACSTR, MAC2STR(peer)); return WLAN_STATUS_AKMP_NOT_VALID; } return WLAN_STATUS_SUCCESS; } u16 owe_process_rsn_ie(struct hostapd_data *hapd, struct sta_info *sta, const u8 *rsn_ie, size_t rsn_ie_len, const u8 *owe_dh, size_t owe_dh_len) { u16 status; u8 *owe_buf, ie[256 * 2]; size_t ie_len = 0; int res; if (!rsn_ie || rsn_ie_len < 2) { wpa_printf(MSG_DEBUG, "OWE: No RSNE in (Re)AssocReq"); status = WLAN_STATUS_INVALID_IE; goto end; } if (!sta->wpa_sm) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); if (!sta->wpa_sm) { wpa_printf(MSG_WARNING, "OWE: Failed to initialize WPA state machine"); status = WLAN_STATUS_UNSPECIFIED_FAILURE; goto end; } rsn_ie -= 2; rsn_ie_len += 2; res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, hapd->iface->freq, rsn_ie, rsn_ie_len, NULL, 0, NULL, 0, owe_dh, owe_dh_len); status = wpa_res_to_status_code(res); if (status != WLAN_STATUS_SUCCESS) goto end; status = owe_process_assoc_req(hapd, sta, owe_dh, owe_dh_len); if (status != WLAN_STATUS_SUCCESS) goto end; owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, ie, sizeof(ie), NULL, 0); if (!owe_buf) { status = WLAN_STATUS_UNSPECIFIED_FAILURE; goto end; } if (sta->owe_ecdh) { struct wpabuf *pub; pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0); if (!pub) { status = WLAN_STATUS_UNSPECIFIED_FAILURE; goto end; } /* OWE Diffie-Hellman Parameter element */ *owe_buf++ = WLAN_EID_EXTENSION; /* Element ID */ *owe_buf++ = 1 + 2 + wpabuf_len(pub); /* Length */ *owe_buf++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */ WPA_PUT_LE16(owe_buf, sta->owe_group); owe_buf += 2; os_memcpy(owe_buf, wpabuf_head(pub), wpabuf_len(pub)); owe_buf += wpabuf_len(pub); wpabuf_free(pub); sta->external_dh_updated = 1; } ie_len = owe_buf - ie; end: wpa_printf(MSG_DEBUG, "OWE: Update status %d, ie len %d for peer " MACSTR, status, (unsigned int) ie_len, MAC2STR(sta->addr)); hostapd_drv_update_dh_ie(hapd, sta->addr, status, status == WLAN_STATUS_SUCCESS ? ie : NULL, ie_len); return status; } #endif /* CONFIG_OWE */ static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, const u8 *ies, size_t ies_len, int reassoc) { struct ieee802_11_elems elems; u16 resp; const u8 *wpa_ie; size_t wpa_ie_len; const u8 *p2p_dev_addr = NULL; if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station sent an invalid " "association request"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = copy_supp_rates(hapd, sta, &elems); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = check_multi_ap(hapd, sta, elems.multi_ap, elems.multi_ap_len); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities); if (resp != WLAN_STATUS_SUCCESS) return resp; if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && !(sta->flags & WLAN_STA_HT)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station does not support " "mandatory HT PHY - reject association"); return WLAN_STATUS_ASSOC_DENIED_NO_HT; } #ifdef CONFIG_IEEE80211AC if (hapd->iconf->ieee80211ac) { resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities); if (resp != WLAN_STATUS_SUCCESS) return resp; resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif); if (resp != WLAN_STATUS_SUCCESS) return resp; } if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && !(sta->flags & WLAN_STA_VHT)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station does not support " "mandatory VHT PHY - reject association"); return WLAN_STATUS_ASSOC_DENIED_NO_VHT; } if (hapd->conf->vendor_vht && !elems.vht_capabilities) { resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht, elems.vendor_vht_len); if (resp != WLAN_STATUS_SUCCESS) return resp; } #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax) { resp = copy_sta_he_capab(hapd, sta, IEEE80211_MODE_AP, elems.he_capabilities, elems.he_capabilities_len); if (resp != WLAN_STATUS_SUCCESS) return resp; } #endif /* CONFIG_IEEE80211AX */ #ifdef CONFIG_P2P if (elems.p2p) { wpabuf_free(sta->p2p_ie); sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); if (sta->p2p_ie) p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie); } else { wpabuf_free(sta->p2p_ie); sta->p2p_ie = NULL; } #endif /* CONFIG_P2P */ if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { wpa_ie = elems.rsn_ie; wpa_ie_len = elems.rsn_ie_len; } else if ((hapd->conf->wpa & WPA_PROTO_WPA) && elems.wpa_ie) { wpa_ie = elems.wpa_ie; wpa_ie_len = elems.wpa_ie_len; } else { wpa_ie = NULL; wpa_ie_len = 0; } #ifdef CONFIG_WPS sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); if (hapd->conf->wps_state && elems.wps_ie) { wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association " "Request - assume WPS is used"); sta->flags |= WLAN_STA_WPS; wpabuf_free(sta->wps_ie); sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_IE_VENDOR_TYPE); if (sta->wps_ie && wps_is_20(sta->wps_ie)) { wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0"); sta->flags |= WLAN_STA_WPS2; } wpa_ie = NULL; wpa_ie_len = 0; if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) { wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in " "(Re)Association Request - reject"); return WLAN_STATUS_INVALID_IE; } } else if (hapd->conf->wps_state && wpa_ie == NULL) { wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in " "(Re)Association Request - possible WPS use"); sta->flags |= WLAN_STA_MAYBE_WPS; } else #endif /* CONFIG_WPS */ if (hapd->conf->wpa && wpa_ie == NULL) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "No WPA/RSN IE in association request"); return WLAN_STATUS_INVALID_IE; } if (hapd->conf->wpa && wpa_ie) { int res; wpa_ie -= 2; wpa_ie_len += 2; if (sta->wpa_sm == NULL) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, p2p_dev_addr); if (sta->wpa_sm == NULL) { wpa_printf(MSG_WARNING, "Failed to initialize WPA " "state machine"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } wpa_auth_set_auth_alg(sta->wpa_sm, sta->auth_alg); res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, hapd->iface->freq, wpa_ie, wpa_ie_len, elems.rsnxe ? elems.rsnxe - 2 : NULL, elems.rsnxe ? elems.rsnxe_len + 2 : 0, elems.mdie, elems.mdie_len, elems.owe_dh, elems.owe_dh_len); resp = wpa_res_to_status_code(res); if (resp != WLAN_STATUS_SUCCESS) return resp; if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_MFP)) == (WLAN_STA_ASSOC | WLAN_STA_MFP) && !sta->sa_query_timed_out && sta->sa_query_count > 0) ap_check_sa_query_timeout(hapd, sta); if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_MFP)) == (WLAN_STA_ASSOC | WLAN_STA_MFP) && !sta->sa_query_timed_out && (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) { /* * STA has already been associated with MFP and SA * Query timeout has not been reached. Reject the * association attempt temporarily and start SA Query, * if one is not pending. */ if (sta->sa_query_count == 0) ap_sta_start_sa_query(hapd, sta); return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; } if (wpa_auth_uses_mfp(sta->wpa_sm)) sta->flags |= WLAN_STA_MFP; else sta->flags &= ~WLAN_STA_MFP; #ifdef CONFIG_IEEE80211R_AP if (sta->auth_alg == WLAN_AUTH_FT) { if (!reassoc) { wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried " "to use association (not " "re-association) with FT auth_alg", MAC2STR(sta->addr)); return WLAN_STATUS_UNSPECIFIED_FAILURE; } resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies, ies_len); if (resp != WLAN_STATUS_SUCCESS) return resp; } #endif /* CONFIG_IEEE80211R_AP */ #ifdef CONFIG_SAE if (wpa_auth_uses_sae(sta->wpa_sm) && sta->sae && sta->sae->state == SAE_ACCEPTED) wpa_auth_add_sae_pmkid(sta->wpa_sm, sta->sae->pmkid); if (wpa_auth_uses_sae(sta->wpa_sm) && sta->auth_alg == WLAN_AUTH_OPEN) { struct rsn_pmksa_cache_entry *sa; sa = wpa_auth_sta_get_pmksa(sta->wpa_sm); if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) { wpa_printf(MSG_DEBUG, "SAE: No PMKSA cache entry found for " MACSTR, MAC2STR(sta->addr)); return WLAN_STATUS_INVALID_PMKID; } wpa_printf(MSG_DEBUG, "SAE: " MACSTR " using PMKSA caching", MAC2STR(sta->addr)); } else if (wpa_auth_uses_sae(sta->wpa_sm) && sta->auth_alg != WLAN_AUTH_SAE && !(sta->auth_alg == WLAN_AUTH_FT && wpa_auth_uses_ft_sae(sta->wpa_sm))) { wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use " "SAE AKM after non-SAE auth_alg %u", MAC2STR(sta->addr), sta->auth_alg); return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG; } if (hapd->conf->sae_pwe == 2 && sta->auth_alg == WLAN_AUTH_SAE && sta->sae && sta->sae->tmp && !sta->sae->tmp->h2e && elems.rsnxe && elems.rsnxe_len >= 1 && (elems.rsnxe[0] & BIT(WLAN_RSNX_CAPAB_SAE_H2E))) { wpa_printf(MSG_INFO, "SAE: " MACSTR " indicates support for SAE H2E, but did not use it", MAC2STR(sta->addr)); return WLAN_STATUS_UNSPECIFIED_FAILURE; } #endif /* CONFIG_SAE */ #ifdef CONFIG_OWE if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) && wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE && elems.owe_dh) { resp = owe_process_assoc_req(hapd, sta, elems.owe_dh, elems.owe_dh_len); if (resp != WLAN_STATUS_SUCCESS) return resp; } #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP2 dpp_pfs_free(sta->dpp_pfs); sta->dpp_pfs = NULL; if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_DPP) && hapd->conf->dpp_netaccesskey && sta->wpa_sm && wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_DPP && elems.owe_dh) { sta->dpp_pfs = dpp_pfs_init( wpabuf_head(hapd->conf->dpp_netaccesskey), wpabuf_len(hapd->conf->dpp_netaccesskey)); if (!sta->dpp_pfs) { wpa_printf(MSG_DEBUG, "DPP: Could not initialize PFS"); /* Try to continue without PFS */ goto pfs_fail; } if (dpp_pfs_process(sta->dpp_pfs, elems.owe_dh, elems.owe_dh_len) < 0) { dpp_pfs_free(sta->dpp_pfs); sta->dpp_pfs = NULL; return WLAN_STATUS_UNSPECIFIED_FAILURE; } } wpa_auth_set_dpp_z(sta->wpa_sm, sta->dpp_pfs ? sta->dpp_pfs->secret : NULL); pfs_fail: #endif /* CONFIG_DPP2 */ if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) && wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station tried to use TKIP with HT " "association"); return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; } #ifdef CONFIG_HS20 } else if (hapd->conf->osen) { if (elems.osen == NULL) { hostapd_logger( hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "No HS 2.0 OSEN element in association request"); return WLAN_STATUS_INVALID_IE; } wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association"); if (sta->wpa_sm == NULL) sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); if (sta->wpa_sm == NULL) { wpa_printf(MSG_WARNING, "Failed to initialize WPA " "state machine"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm, elems.osen - 2, elems.osen_len + 2) < 0) return WLAN_STATUS_INVALID_IE; #endif /* CONFIG_HS20 */ } else wpa_auth_sta_no_wpa(sta->wpa_sm); #ifdef CONFIG_P2P p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len); #endif /* CONFIG_P2P */ #ifdef CONFIG_HS20 wpabuf_free(sta->hs20_ie); if (elems.hs20 && elems.hs20_len > 4) { int release; sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, elems.hs20_len - 4); release = ((elems.hs20[4] >> 4) & 0x0f) + 1; if (release >= 2 && !wpa_auth_uses_mfp(sta->wpa_sm) && hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { wpa_printf(MSG_DEBUG, "HS 2.0: PMF not negotiated by release %d station " MACSTR, release, MAC2STR(sta->addr)); return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION; } } else { sta->hs20_ie = NULL; } wpabuf_free(sta->roaming_consortium); if (elems.roaming_cons_sel) sta->roaming_consortium = wpabuf_alloc_copy( elems.roaming_cons_sel + 4, elems.roaming_cons_sel_len - 4); else sta->roaming_consortium = NULL; #endif /* CONFIG_HS20 */ #ifdef CONFIG_FST wpabuf_free(sta->mb_ies); if (hapd->iface->fst) sta->mb_ies = mb_ies_by_info(&elems.mb_ies); else sta->mb_ies = NULL; #endif /* CONFIG_FST */ #ifdef CONFIG_MBO mbo_ap_check_sta_assoc(hapd, sta, &elems); if (hapd->conf->mbo_enabled && (hapd->conf->wpa & 2) && elems.mbo && sta->cell_capa && !(sta->flags & WLAN_STA_MFP) && hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { wpa_printf(MSG_INFO, "MBO: Reject WPA2 association without PMF"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } #endif /* CONFIG_MBO */ #if defined(CONFIG_FILS) && defined(CONFIG_OCV) if (wpa_auth_uses_ocv(sta->wpa_sm) && (sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK)) { struct wpa_channel_info ci; int tx_chanwidth; int tx_seg1_idx; if (hostapd_drv_channel_info(hapd, &ci) != 0) { wpa_printf(MSG_WARNING, "Failed to get channel info to validate received OCI in FILS (Re)Association Request frame"); return WLAN_STATUS_UNSPECIFIED_FAILURE; } if (get_sta_tx_parameters(sta->wpa_sm, channel_width_to_int(ci.chanwidth), ci.seg1_idx, &tx_chanwidth, &tx_seg1_idx) < 0) return WLAN_STATUS_UNSPECIFIED_FAILURE; if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, tx_chanwidth, tx_seg1_idx) != 0) { wpa_printf(MSG_WARNING, "FILS: %s", ocv_errorstr); return WLAN_STATUS_UNSPECIFIED_FAILURE; } } #endif /* CONFIG_FILS && CONFIG_OCV */ ap_copy_sta_supp_op_classes(sta, elems.supp_op_classes, elems.supp_op_classes_len); if ((sta->capability & WLAN_CAPABILITY_RADIO_MEASUREMENT) && elems.rrm_enabled && elems.rrm_enabled_len >= sizeof(sta->rrm_enabled_capa)) os_memcpy(sta->rrm_enabled_capa, elems.rrm_enabled, sizeof(sta->rrm_enabled_capa)); if (elems.power_capab) { sta->min_tx_power = elems.power_capab[0]; sta->max_tx_power = elems.power_capab[1]; sta->power_capab = 1; } else { sta->power_capab = 0; } return WLAN_STATUS_SUCCESS; } static void send_deauth(struct hostapd_data *hapd, const u8 *addr, u16 reason_code) { int send_len; struct ieee80211_mgmt reply; os_memset(&reply, 0, sizeof(reply)); reply.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH); os_memcpy(reply.da, addr, ETH_ALEN); os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN); os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN); send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth); reply.u.deauth.reason_code = host_to_le16(reason_code); if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0, NULL, 0, 0) < 0) wpa_printf(MSG_INFO, "Failed to send deauth: %s", strerror(errno)); } static int add_associated_sta(struct hostapd_data *hapd, struct sta_info *sta, int reassoc) { struct ieee80211_ht_capabilities ht_cap; struct ieee80211_vht_capabilities vht_cap; struct ieee80211_he_capabilities he_cap; int set = 1; /* * Remove the STA entry to ensure the STA PS state gets cleared and * configuration gets updated. This is relevant for cases, such as * FT-over-the-DS, where a station re-associates back to the same AP but * skips the authentication flow, or if working with a driver that * does not support full AP client state. * * Skip this if the STA has already completed FT reassociation and the * TK has been configured since the TX/RX PN must not be reset to 0 for * the same key. * * FT-over-the-DS has a special case where the STA entry (and as such, * the TK) has not yet been configured to the driver depending on which * driver interface is used. For that case, allow add-STA operation to * be used (instead of set-STA). This is needed to allow mac80211-based * drivers to accept the STA parameter configuration. Since this is * after a new FT-over-DS exchange, a new TK has been derived, so key * reinstallation is not a concern for this case. */ wpa_printf(MSG_DEBUG, "Add associated STA " MACSTR " (added_unassoc=%d auth_alg=%u ft_over_ds=%u reassoc=%d authorized=%d ft_tk=%d fils_tk=%d)", MAC2STR(sta->addr), sta->added_unassoc, sta->auth_alg, sta->ft_over_ds, reassoc, !!(sta->flags & WLAN_STA_AUTHORIZED), wpa_auth_sta_ft_tk_already_set(sta->wpa_sm), wpa_auth_sta_fils_tk_already_set(sta->wpa_sm)); if (!sta->added_unassoc && (!(sta->flags & WLAN_STA_AUTHORIZED) || (reassoc && sta->ft_over_ds && sta->auth_alg == WLAN_AUTH_FT) || (!wpa_auth_sta_ft_tk_already_set(sta->wpa_sm) && !wpa_auth_sta_fils_tk_already_set(sta->wpa_sm)))) { hostapd_drv_sta_remove(hapd, sta->addr); wpa_auth_sm_event(sta->wpa_sm, WPA_DRV_STA_REMOVED); set = 0; /* Do not allow the FT-over-DS exception to be used more than * once per authentication exchange to guarantee a new TK is * used here */ sta->ft_over_ds = 0; } if (sta->flags & WLAN_STA_HT) hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap); #ifdef CONFIG_IEEE80211AC if (sta->flags & WLAN_STA_VHT) hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap); #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (sta->flags & WLAN_STA_HE) { hostapd_get_he_capab(hapd, sta->he_capab, &he_cap, sta->he_capab_len); } #endif /* CONFIG_IEEE80211AX */ /* * Add the station with forced WLAN_STA_ASSOC flag. The sta->flags * will be set when the ACK frame for the (Re)Association Response frame * is processed (TX status driver event). */ if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability, sta->supported_rates, sta->supported_rates_len, sta->listen_interval, sta->flags & WLAN_STA_HT ? &ht_cap : NULL, sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, sta->flags & WLAN_STA_HE ? &he_cap : NULL, sta->flags & WLAN_STA_HE ? sta->he_capab_len : 0, sta->flags | WLAN_STA_ASSOC, sta->qosinfo, sta->vht_opmode, sta->p2p_ie ? 1 : 0, set)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE, "Could not %s STA to kernel driver", set ? "set" : "add"); if (sta->added_unassoc) { hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; } return -1; } sta->added_unassoc = 0; return 0; } static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta, const u8 *addr, u16 status_code, int reassoc, const u8 *ies, size_t ies_len, int rssi) { int send_len; u8 *buf; size_t buflen; struct ieee80211_mgmt *reply; u8 *p; u16 res = WLAN_STATUS_SUCCESS; buflen = sizeof(struct ieee80211_mgmt) + 1024; #ifdef CONFIG_FILS if (sta && sta->fils_hlp_resp) buflen += wpabuf_len(sta->fils_hlp_resp); if (sta) buflen += 150; #endif /* CONFIG_FILS */ #ifdef CONFIG_OWE if (sta && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE)) buflen += 150; #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP2 if (sta && sta->dpp_pfs) buflen += 5 + sta->dpp_pfs->curve->prime_len; #endif /* CONFIG_DPP2 */ buf = os_zalloc(buflen); if (!buf) { res = WLAN_STATUS_UNSPECIFIED_FAILURE; goto done; } reply = (struct ieee80211_mgmt *) buf; reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, (reassoc ? WLAN_FC_STYPE_REASSOC_RESP : WLAN_FC_STYPE_ASSOC_RESP)); os_memcpy(reply->da, addr, ETH_ALEN); os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN); os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN); send_len = IEEE80211_HDRLEN; send_len += sizeof(reply->u.assoc_resp); reply->u.assoc_resp.capab_info = host_to_le16(hostapd_own_capab_info(hapd)); reply->u.assoc_resp.status_code = host_to_le16(status_code); reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) | BIT(14) | BIT(15)); /* Supported rates */ p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable); /* Extended supported rates */ p = hostapd_eid_ext_supp_rates(hapd, p); /* Radio measurement capabilities */ p = hostapd_eid_rm_enabled_capab(hapd, p, buf + buflen - p); #ifdef CONFIG_MBO if (status_code == WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS && rssi != 0) { int delta = hapd->iconf->rssi_reject_assoc_rssi - rssi; p = hostapd_eid_mbo_rssi_assoc_rej(hapd, p, buf + buflen - p, delta); } #endif /* CONFIG_MBO */ #ifdef CONFIG_IEEE80211R_AP if (sta && status_code == WLAN_STATUS_SUCCESS) { /* IEEE 802.11r: Mobility Domain Information, Fast BSS * Transition Information, RSN, [RIC Response] */ p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p, buf + buflen - p, sta->auth_alg, ies, ies_len); if (!p) { wpa_printf(MSG_DEBUG, "FT: Failed to write AssocResp IEs"); res = WLAN_STATUS_UNSPECIFIED_FAILURE; goto done; } } #endif /* CONFIG_IEEE80211R_AP */ #ifdef CONFIG_FILS if (sta && status_code == WLAN_STATUS_SUCCESS && (sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK)) p = wpa_auth_write_assoc_resp_fils(sta->wpa_sm, p, buf + buflen - p, ies, ies_len); #endif /* CONFIG_FILS */ #ifdef CONFIG_OWE if (sta && status_code == WLAN_STATUS_SUCCESS && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE)) p = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, p, buf + buflen - p, ies, ies_len); #endif /* CONFIG_OWE */ if (sta && status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) p = hostapd_eid_assoc_comeback_time(hapd, sta, p); p = hostapd_eid_ht_capabilities(hapd, p); p = hostapd_eid_ht_operation(hapd, p); #ifdef CONFIG_IEEE80211AC if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac && !is_6ghz_op_class(hapd->iconf->op_class)) { u32 nsts = 0, sta_nsts; if (sta && hapd->conf->use_sta_nsts && sta->vht_capabilities) { struct ieee80211_vht_capabilities *capa; nsts = (hapd->iface->conf->vht_capab >> VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7; capa = sta->vht_capabilities; sta_nsts = (le_to_host32(capa->vht_capabilities_info) >> VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7; if (nsts < sta_nsts) nsts = 0; else nsts = sta_nsts; } p = hostapd_eid_vht_capabilities(hapd, p, nsts); p = hostapd_eid_vht_operation(hapd, p); } #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (hapd->iconf->ieee80211ax) { p = hostapd_eid_he_capab(hapd, p, IEEE80211_MODE_AP); p = hostapd_eid_he_operation(hapd, p); p = hostapd_eid_spatial_reuse(hapd, p); p = hostapd_eid_he_mu_edca_parameter_set(hapd, p); } #endif /* CONFIG_IEEE80211AX */ p = hostapd_eid_ext_capab(hapd, p); p = hostapd_eid_bss_max_idle_period(hapd, p); if (sta && sta->qos_map_enabled) p = hostapd_eid_qos_map_set(hapd, p); #ifdef CONFIG_FST if (hapd->iface->fst_ies) { os_memcpy(p, wpabuf_head(hapd->iface->fst_ies), wpabuf_len(hapd->iface->fst_ies)); p += wpabuf_len(hapd->iface->fst_ies); } #endif /* CONFIG_FST */ p = hostapd_eid_rsnxe(hapd, p, buf + buflen - p); #ifdef CONFIG_OWE if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) && sta && sta->owe_ecdh && status_code == WLAN_STATUS_SUCCESS && wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE) { struct wpabuf *pub; pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0); if (!pub) { res = WLAN_STATUS_UNSPECIFIED_FAILURE; goto done; } /* OWE Diffie-Hellman Parameter element */ *p++ = WLAN_EID_EXTENSION; /* Element ID */ *p++ = 1 + 2 + wpabuf_len(pub); /* Length */ *p++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */ WPA_PUT_LE16(p, sta->owe_group); p += 2; os_memcpy(p, wpabuf_head(pub), wpabuf_len(pub)); p += wpabuf_len(pub); wpabuf_free(pub); } #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP2 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_DPP) && sta && sta->dpp_pfs && status_code == WLAN_STATUS_SUCCESS && wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_DPP) { os_memcpy(p, wpabuf_head(sta->dpp_pfs->ie), wpabuf_len(sta->dpp_pfs->ie)); p += wpabuf_len(sta->dpp_pfs->ie); } #endif /* CONFIG_DPP2 */ #ifdef CONFIG_IEEE80211AC if (sta && hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT)) p = hostapd_eid_vendor_vht(hapd, p); #endif /* CONFIG_IEEE80211AC */ if (sta && (sta->flags & WLAN_STA_WMM)) p = hostapd_eid_wmm(hapd, p); #ifdef CONFIG_WPS if (sta && ((sta->flags & WLAN_STA_WPS) || ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa))) { struct wpabuf *wps = wps_build_assoc_resp_ie(); if (wps) { os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps)); p += wpabuf_len(wps); wpabuf_free(wps); } } #endif /* CONFIG_WPS */ if (sta && (sta->flags & WLAN_STA_MULTI_AP)) p = hostapd_eid_multi_ap(hapd, p); #ifdef CONFIG_P2P if (sta && sta->p2p_ie && hapd->p2p_group) { struct wpabuf *p2p_resp_ie; enum p2p_status_code status; switch (status_code) { case WLAN_STATUS_SUCCESS: status = P2P_SC_SUCCESS; break; case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA: status = P2P_SC_FAIL_LIMIT_REACHED; break; default: status = P2P_SC_FAIL_INVALID_PARAMS; break; } p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status); if (p2p_resp_ie) { os_memcpy(p, wpabuf_head(p2p_resp_ie), wpabuf_len(p2p_resp_ie)); p += wpabuf_len(p2p_resp_ie); wpabuf_free(p2p_resp_ie); } } #endif /* CONFIG_P2P */ #ifdef CONFIG_P2P_MANAGER if (hapd->conf->p2p & P2P_MANAGE) p = hostapd_eid_p2p_manage(hapd, p); #endif /* CONFIG_P2P_MANAGER */ p = hostapd_eid_mbo(hapd, p, buf + buflen - p); if (hapd->conf->assocresp_elements && (size_t) (buf + buflen - p) >= wpabuf_len(hapd->conf->assocresp_elements)) { os_memcpy(p, wpabuf_head(hapd->conf->assocresp_elements), wpabuf_len(hapd->conf->assocresp_elements)); p += wpabuf_len(hapd->conf->assocresp_elements); } send_len += p - reply->u.assoc_resp.variable; #ifdef CONFIG_FILS if (sta && (sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK) && status_code == WLAN_STATUS_SUCCESS) { struct ieee802_11_elems elems; if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) == ParseFailed || !elems.fils_session) { res = WLAN_STATUS_UNSPECIFIED_FAILURE; goto done; } /* FILS Session */ *p++ = WLAN_EID_EXTENSION; /* Element ID */ *p++ = 1 + FILS_SESSION_LEN; /* Length */ *p++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */ os_memcpy(p, elems.fils_session, FILS_SESSION_LEN); send_len += 2 + 1 + FILS_SESSION_LEN; send_len = fils_encrypt_assoc(sta->wpa_sm, buf, send_len, buflen, sta->fils_hlp_resp); if (send_len < 0) { res = WLAN_STATUS_UNSPECIFIED_FAILURE; goto done; } } #endif /* CONFIG_FILS */ if (hostapd_drv_send_mlme(hapd, reply, send_len, 0, NULL, 0, 0) < 0) { wpa_printf(MSG_INFO, "Failed to send assoc resp: %s", strerror(errno)); res = WLAN_STATUS_UNSPECIFIED_FAILURE; } done: os_free(buf); return res; } #ifdef CONFIG_OWE u8 * owe_assoc_req_process(struct hostapd_data *hapd, struct sta_info *sta, const u8 *owe_dh, u8 owe_dh_len, u8 *owe_buf, size_t owe_buf_len, u16 *status) { #ifdef CONFIG_TESTING_OPTIONS if (hapd->conf->own_ie_override) { wpa_printf(MSG_DEBUG, "OWE: Using IE override"); *status = WLAN_STATUS_SUCCESS; return wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf, owe_buf_len, NULL, 0); } #endif /* CONFIG_TESTING_OPTIONS */ if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) { wpa_printf(MSG_DEBUG, "OWE: Using PMKSA caching"); owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf, owe_buf_len, NULL, 0); *status = WLAN_STATUS_SUCCESS; return owe_buf; } if (sta->owe_pmk && sta->external_dh_updated) { wpa_printf(MSG_DEBUG, "OWE: Using previously derived PMK"); *status = WLAN_STATUS_SUCCESS; return owe_buf; } *status = owe_process_assoc_req(hapd, sta, owe_dh, owe_dh_len); if (*status != WLAN_STATUS_SUCCESS) return NULL; owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf, owe_buf_len, NULL, 0); if (sta->owe_ecdh && owe_buf) { struct wpabuf *pub; pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0); if (!pub) { *status = WLAN_STATUS_UNSPECIFIED_FAILURE; return owe_buf; } /* OWE Diffie-Hellman Parameter element */ *owe_buf++ = WLAN_EID_EXTENSION; /* Element ID */ *owe_buf++ = 1 + 2 + wpabuf_len(pub); /* Length */ *owe_buf++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */ WPA_PUT_LE16(owe_buf, sta->owe_group); owe_buf += 2; os_memcpy(owe_buf, wpabuf_head(pub), wpabuf_len(pub)); owe_buf += wpabuf_len(pub); wpabuf_free(pub); } return owe_buf; } #endif /* CONFIG_OWE */ #ifdef CONFIG_FILS void fils_hlp_finish_assoc(struct hostapd_data *hapd, struct sta_info *sta) { u16 reply_res; wpa_printf(MSG_DEBUG, "FILS: Finish association with " MACSTR, MAC2STR(sta->addr)); eloop_cancel_timeout(fils_hlp_timeout, hapd, sta); if (!sta->fils_pending_assoc_req) return; reply_res = send_assoc_resp(hapd, sta, sta->addr, WLAN_STATUS_SUCCESS, sta->fils_pending_assoc_is_reassoc, sta->fils_pending_assoc_req, sta->fils_pending_assoc_req_len, 0); os_free(sta->fils_pending_assoc_req); sta->fils_pending_assoc_req = NULL; sta->fils_pending_assoc_req_len = 0; wpabuf_free(sta->fils_hlp_resp); sta->fils_hlp_resp = NULL; wpabuf_free(sta->hlp_dhcp_discover); sta->hlp_dhcp_discover = NULL; /* * Remove the station in case transmission of a success response fails. * At this point the station was already added associated to the driver. */ if (reply_res != WLAN_STATUS_SUCCESS) hostapd_drv_sta_remove(hapd, sta->addr); } void fils_hlp_timeout(void *eloop_ctx, void *eloop_data) { struct hostapd_data *hapd = eloop_ctx; struct sta_info *sta = eloop_data; wpa_printf(MSG_DEBUG, "FILS: HLP response timeout - continue with association response for " MACSTR, MAC2STR(sta->addr)); if (sta->fils_drv_assoc_finish) hostapd_notify_assoc_fils_finish(hapd, sta); else fils_hlp_finish_assoc(hapd, sta); } #endif /* CONFIG_FILS */ static void handle_assoc(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int reassoc, int rssi) { u16 capab_info, listen_interval, seq_ctrl, fc; u16 resp = WLAN_STATUS_SUCCESS, reply_res; const u8 *pos; int left, i; struct sta_info *sta; u8 *tmp = NULL; #ifdef CONFIG_FILS int delay_assoc = 0; #endif /* CONFIG_FILS */ if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) : sizeof(mgmt->u.assoc_req))) { wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)", reassoc, (unsigned long) len); return; } #ifdef CONFIG_TESTING_OPTIONS if (reassoc) { if (hapd->iconf->ignore_reassoc_probability > 0.0 && drand48() < hapd->iconf->ignore_reassoc_probability) { wpa_printf(MSG_INFO, "TESTING: ignoring reassoc request from " MACSTR, MAC2STR(mgmt->sa)); return; } } else { if (hapd->iconf->ignore_assoc_probability > 0.0 && drand48() < hapd->iconf->ignore_assoc_probability) { wpa_printf(MSG_INFO, "TESTING: ignoring assoc request from " MACSTR, MAC2STR(mgmt->sa)); return; } } #endif /* CONFIG_TESTING_OPTIONS */ fc = le_to_host16(mgmt->frame_control); seq_ctrl = le_to_host16(mgmt->seq_ctrl); if (reassoc) { capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info); listen_interval = le_to_host16( mgmt->u.reassoc_req.listen_interval); wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR " capab_info=0x%02x listen_interval=%d current_ap=" MACSTR " seq_ctrl=0x%x%s", MAC2STR(mgmt->sa), capab_info, listen_interval, MAC2STR(mgmt->u.reassoc_req.current_ap), seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : ""); left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req)); pos = mgmt->u.reassoc_req.variable; } else { capab_info = le_to_host16(mgmt->u.assoc_req.capab_info); listen_interval = le_to_host16( mgmt->u.assoc_req.listen_interval); wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR " capab_info=0x%02x listen_interval=%d " "seq_ctrl=0x%x%s", MAC2STR(mgmt->sa), capab_info, listen_interval, seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : ""); left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req)); pos = mgmt->u.assoc_req.variable; } sta = ap_get_sta(hapd, mgmt->sa); #ifdef CONFIG_IEEE80211R_AP if (sta && sta->auth_alg == WLAN_AUTH_FT && (sta->flags & WLAN_STA_AUTH) == 0) { wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate " "prior to authentication since it is using " "over-the-DS FT", MAC2STR(mgmt->sa)); /* * Mark station as authenticated, to avoid adding station * entry in the driver as associated and not authenticated */ sta->flags |= WLAN_STA_AUTH; } else #endif /* CONFIG_IEEE80211R_AP */ if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) { if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) { int acl_res; struct radius_sta info; acl_res = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len, &info); if (acl_res == HOSTAPD_ACL_REJECT) { wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Ignore Association Request frame from " MACSTR " due to ACL reject", MAC2STR(mgmt->sa)); resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (acl_res == HOSTAPD_ACL_PENDING) return; /* DMG/IEEE 802.11ad does not use authentication. * Allocate sta entry upon association. */ sta = ap_sta_add(hapd, mgmt->sa); if (!sta) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Failed to add STA"); resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; goto fail; } acl_res = ieee802_11_set_radius_info( hapd, sta, acl_res, &info); if (acl_res) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Skip authentication for DMG/IEEE 802.11ad"); sta->flags |= WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH); sta->auth_alg = WLAN_AUTH_OPEN; } else { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "Station tried to associate before authentication (aid=%d flags=0x%x)", sta ? sta->aid : -1, sta ? sta->flags : 0); send_deauth(hapd, mgmt->sa, WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA); return; } } if ((fc & WLAN_FC_RETRY) && sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ && sta->last_seq_ctrl == seq_ctrl && sta->last_subtype == (reassoc ? WLAN_FC_STYPE_REASSOC_REQ : WLAN_FC_STYPE_ASSOC_REQ)) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Drop repeated association frame seq_ctrl=0x%x", seq_ctrl); return; } sta->last_seq_ctrl = seq_ctrl; sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ : WLAN_FC_STYPE_ASSOC_REQ; if (hapd->tkip_countermeasures) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } if (listen_interval > hapd->conf->max_listen_interval) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Too large Listen Interval (%d)", listen_interval); resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE; goto fail; } #ifdef CONFIG_MBO if (hapd->conf->mbo_enabled && hapd->mbo_assoc_disallow) { resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; goto fail; } if (hapd->iconf->rssi_reject_assoc_rssi && rssi && rssi < hapd->iconf->rssi_reject_assoc_rssi && (sta->auth_rssi == 0 || sta->auth_rssi < hapd->iconf->rssi_reject_assoc_rssi)) { resp = WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS; goto fail; } #endif /* CONFIG_MBO */ /* * sta->capability is used in check_assoc_ies() for RRM enabled * capability element. */ sta->capability = capab_info; #ifdef CONFIG_FILS if (sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK) { int res; /* The end of the payload is encrypted. Need to decrypt it * before parsing. */ tmp = os_memdup(pos, left); if (!tmp) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } res = fils_decrypt_assoc(sta->wpa_sm, sta->fils_session, mgmt, len, tmp, left); if (res < 0) { resp = WLAN_STATUS_UNSPECIFIED_FAILURE; goto fail; } pos = tmp; left = res; } #endif /* CONFIG_FILS */ /* followed by SSID and Supported rates; and HT capabilities if 802.11n * is used */ resp = check_assoc_ies(hapd, sta, pos, left, reassoc); if (resp != WLAN_STATUS_SUCCESS) goto fail; if (hostapd_get_aid(hapd, sta) < 0) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "No room for more AIDs"); resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; goto fail; } sta->listen_interval = listen_interval; if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) sta->flags |= WLAN_STA_NONERP; for (i = 0; i < sta->supported_rates_len; i++) { if ((sta->supported_rates[i] & 0x7f) > 22) { sta->flags &= ~WLAN_STA_NONERP; break; } } if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) { sta->nonerp_set = 1; hapd->iface->num_sta_non_erp++; if (hapd->iface->num_sta_non_erp == 1) ieee802_11_set_beacons(hapd->iface); } if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) && !sta->no_short_slot_time_set) { sta->no_short_slot_time_set = 1; hapd->iface->num_sta_no_short_slot_time++; if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->iface->num_sta_no_short_slot_time == 1) ieee802_11_set_beacons(hapd->iface); } if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) sta->flags |= WLAN_STA_SHORT_PREAMBLE; else sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && !sta->no_short_preamble_set) { sta->no_short_preamble_set = 1; hapd->iface->num_sta_no_short_preamble++; if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->iface->num_sta_no_short_preamble == 1) ieee802_11_set_beacons(hapd->iface); } update_ht_state(hapd, sta); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "association OK (aid %d)", sta->aid); /* Station will be marked associated, after it acknowledges AssocResp */ sta->flags |= WLAN_STA_ASSOC_REQ_OK; if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) { wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out " "SA Query procedure", reassoc ? "re" : ""); /* TODO: Send a protected Disassociate frame to the STA using * the old key and Reason Code "Previous Authentication no * longer valid". Make sure this is only sent protected since * unprotected frame would be received by the STA that is now * trying to associate. */ } /* Make sure that the previously registered inactivity timer will not * remove the STA immediately. */ sta->timeout_next = STA_NULLFUNC; #ifdef CONFIG_TAXONOMY taxonomy_sta_info_assoc_req(hapd, sta, pos, left); #endif /* CONFIG_TAXONOMY */ sta->pending_wds_enable = 0; #ifdef CONFIG_FILS if (sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK) { if (fils_process_hlp(hapd, sta, pos, left) > 0) delay_assoc = 1; } #endif /* CONFIG_FILS */ fail: /* * In case of a successful response, add the station to the driver. * Otherwise, the kernel may ignore Data frames before we process the * ACK frame (TX status). In case of a failure, this station will be * removed. * * Note that this is not compliant with the IEEE 802.11 standard that * states that a non-AP station should transition into the * authenticated/associated state only after the station acknowledges * the (Re)Association Response frame. However, still do this as: * * 1. In case the station does not acknowledge the (Re)Association * Response frame, it will be removed. * 2. Data frames will be dropped in the kernel until the station is * set into authorized state, and there are no significant known * issues with processing other non-Data Class 3 frames during this * window. */ if (resp == WLAN_STATUS_SUCCESS && sta && add_associated_sta(hapd, sta, reassoc)) resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA; #ifdef CONFIG_FILS if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS && eloop_is_timeout_registered(fils_hlp_timeout, hapd, sta) && sta->fils_pending_assoc_req) { /* Do not reschedule fils_hlp_timeout in case the station * retransmits (Re)Association Request frame while waiting for * the previously started FILS HLP wait, so that the timeout can * be determined from the first pending attempt. */ wpa_printf(MSG_DEBUG, "FILS: Continue waiting for HLP processing before sending (Re)Association Response frame to " MACSTR, MAC2STR(sta->addr)); os_free(tmp); return; } if (sta) { eloop_cancel_timeout(fils_hlp_timeout, hapd, sta); os_free(sta->fils_pending_assoc_req); sta->fils_pending_assoc_req = NULL; sta->fils_pending_assoc_req_len = 0; wpabuf_free(sta->fils_hlp_resp); sta->fils_hlp_resp = NULL; } if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS) { sta->fils_pending_assoc_req = tmp; sta->fils_pending_assoc_req_len = left; sta->fils_pending_assoc_is_reassoc = reassoc; sta->fils_drv_assoc_finish = 0; wpa_printf(MSG_DEBUG, "FILS: Waiting for HLP processing before sending (Re)Association Response frame to " MACSTR, MAC2STR(sta->addr)); eloop_cancel_timeout(fils_hlp_timeout, hapd, sta); eloop_register_timeout(0, hapd->conf->fils_hlp_wait_time * 1024, fils_hlp_timeout, hapd, sta); return; } #endif /* CONFIG_FILS */ reply_res = send_assoc_resp(hapd, sta, mgmt->sa, resp, reassoc, pos, left, rssi); os_free(tmp); /* * Remove the station in case tranmission of a success response fails * (the STA was added associated to the driver) or if the station was * previously added unassociated. */ if (sta && ((reply_res != WLAN_STATUS_SUCCESS && resp == WLAN_STATUS_SUCCESS) || sta->added_unassoc)) { hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; } } static void handle_disassoc(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { struct sta_info *sta; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) { wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)", (unsigned long) len); return; } wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d", MAC2STR(mgmt->sa), le_to_host16(mgmt->u.disassoc.reason_code)); sta = ap_get_sta(hapd, mgmt->sa); if (sta == NULL) { wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated", MAC2STR(mgmt->sa)); return; } ap_sta_set_authorized(hapd, sta, 0); sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ; sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "disassociated"); sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); /* Stop Accounting and IEEE 802.1X sessions, but leave the STA * authenticated. */ accounting_sta_stop(hapd, sta); ieee802_1x_free_station(hapd, sta); if (sta->ipaddr) hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr); ap_sta_ip6addr_del(hapd, sta); hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; if (sta->timeout_next == STA_NULLFUNC || sta->timeout_next == STA_DISASSOC) { sta->timeout_next = STA_DEAUTH; eloop_cancel_timeout(ap_handle_timer, hapd, sta); eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer, hapd, sta); } mlme_disassociate_indication( hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code)); /* DMG/IEEE 802.11ad does not use deauthication. Deallocate sta upon * disassociation. */ if (hapd->iface->current_mode && hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) { sta->flags &= ~WLAN_STA_AUTH; wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "deauthenticated"); ap_free_sta(hapd, sta); } } static void handle_deauth(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len) { struct sta_info *sta; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) { wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short " "payload (len=%lu)", (unsigned long) len); return; } wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR " reason_code=%d", MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code)); sta = ap_get_sta(hapd, mgmt->sa); if (sta == NULL) { wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying " "to deauthenticate, but it is not authenticated", MAC2STR(mgmt->sa)); return; } ap_sta_set_authorized(hapd, sta, 0); sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ; sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK); wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "deauthenticated"); mlme_deauthenticate_indication( hapd, sta, le_to_host16(mgmt->u.deauth.reason_code)); sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); ap_free_sta(hapd, sta); } static void handle_beacon(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, struct hostapd_frame_info *fi) { struct ieee802_11_elems elems; if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) { wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)", (unsigned long) len); return; } (void) ieee802_11_parse_elems(mgmt->u.beacon.variable, len - (IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)), &elems, 0); ap_list_process_beacon(hapd->iface, mgmt, &elems, fi); } static int robust_action_frame(u8 category) { return category != WLAN_ACTION_PUBLIC && category != WLAN_ACTION_HT; } static int handle_action(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, unsigned int freq) { struct sta_info *sta; u8 *action __maybe_unused; if (len < IEEE80211_HDRLEN + 2 + 1) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "handle_action - too short payload (len=%lu)", (unsigned long) len); return 0; } action = (u8 *) &mgmt->u.action.u; wpa_printf(MSG_DEBUG, "RX_ACTION category %u action %u sa " MACSTR " da " MACSTR " len %d freq %u", mgmt->u.action.category, *action, MAC2STR(mgmt->sa), MAC2STR(mgmt->da), (int) len, freq); sta = ap_get_sta(hapd, mgmt->sa); if (mgmt->u.action.category != WLAN_ACTION_PUBLIC && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) { wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action " "frame (category=%u) from unassociated STA " MACSTR, mgmt->u.action.category, MAC2STR(mgmt->sa)); return 0; } if (sta && (sta->flags & WLAN_STA_MFP) && !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) && robust_action_frame(mgmt->u.action.category)) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Dropped unprotected Robust Action frame from " "an MFP STA"); return 0; } if (sta) { u16 fc = le_to_host16(mgmt->frame_control); u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl); if ((fc & WLAN_FC_RETRY) && sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ && sta->last_seq_ctrl == seq_ctrl && sta->last_subtype == WLAN_FC_STYPE_ACTION) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "Drop repeated action frame seq_ctrl=0x%x", seq_ctrl); return 1; } sta->last_seq_ctrl = seq_ctrl; sta->last_subtype = WLAN_FC_STYPE_ACTION; } switch (mgmt->u.action.category) { #ifdef CONFIG_IEEE80211R_AP case WLAN_ACTION_FT: if (!sta || wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action, len - IEEE80211_HDRLEN)) break; return 1; #endif /* CONFIG_IEEE80211R_AP */ case WLAN_ACTION_WMM: hostapd_wmm_action(hapd, mgmt, len); return 1; case WLAN_ACTION_SA_QUERY: ieee802_11_sa_query_action(hapd, mgmt, len); return 1; #ifdef CONFIG_WNM_AP case WLAN_ACTION_WNM: ieee802_11_rx_wnm_action_ap(hapd, mgmt, len); return 1; #endif /* CONFIG_WNM_AP */ #ifdef CONFIG_FST case WLAN_ACTION_FST: if (hapd->iface->fst) fst_rx_action(hapd->iface->fst, mgmt, len); else wpa_printf(MSG_DEBUG, "FST: Ignore FST Action frame - no FST attached"); return 1; #endif /* CONFIG_FST */ case WLAN_ACTION_PUBLIC: case WLAN_ACTION_PROTECTED_DUAL: if (len >= IEEE80211_HDRLEN + 2 && mgmt->u.action.u.public_action.action == WLAN_PA_20_40_BSS_COEX) { hostapd_2040_coex_action(hapd, mgmt, len); return 1; } #ifdef CONFIG_DPP if (len >= IEEE80211_HDRLEN + 6 && mgmt->u.action.u.vs_public_action.action == WLAN_PA_VENDOR_SPECIFIC && WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) == OUI_WFA && mgmt->u.action.u.vs_public_action.variable[0] == DPP_OUI_TYPE) { const u8 *pos, *end; pos = mgmt->u.action.u.vs_public_action.oui; end = ((const u8 *) mgmt) + len; hostapd_dpp_rx_action(hapd, mgmt->sa, pos, end - pos, freq); return 1; } if (len >= IEEE80211_HDRLEN + 2 && (mgmt->u.action.u.public_action.action == WLAN_PA_GAS_INITIAL_RESP || mgmt->u.action.u.public_action.action == WLAN_PA_GAS_COMEBACK_RESP)) { const u8 *pos, *end; pos = &mgmt->u.action.u.public_action.action; end = ((const u8 *) mgmt) + len; gas_query_ap_rx(hapd->gas, mgmt->sa, mgmt->u.action.category, pos, end - pos, hapd->iface->freq); return 1; } #endif /* CONFIG_DPP */ if (hapd->public_action_cb) { hapd->public_action_cb(hapd->public_action_cb_ctx, (u8 *) mgmt, len, hapd->iface->freq); } if (hapd->public_action_cb2) { hapd->public_action_cb2(hapd->public_action_cb2_ctx, (u8 *) mgmt, len, hapd->iface->freq); } if (hapd->public_action_cb || hapd->public_action_cb2) return 1; break; case WLAN_ACTION_VENDOR_SPECIFIC: if (hapd->vendor_action_cb) { if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx, (u8 *) mgmt, len, hapd->iface->freq) == 0) return 1; } break; case WLAN_ACTION_RADIO_MEASUREMENT: hostapd_handle_radio_measurement(hapd, (const u8 *) mgmt, len); return 1; } hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "handle_action - unknown action category %d or invalid " "frame", mgmt->u.action.category); if (!is_multicast_ether_addr(mgmt->da) && !(mgmt->u.action.category & 0x80) && !is_multicast_ether_addr(mgmt->sa)) { struct ieee80211_mgmt *resp; /* * IEEE 802.11-REVma/D9.0 - 7.3.1.11 * Return the Action frame to the source without change * except that MSB of the Category set to 1. */ wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action " "frame back to sender"); resp = os_memdup(mgmt, len); if (resp == NULL) return 0; os_memcpy(resp->da, resp->sa, ETH_ALEN); os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); resp->u.action.category |= 0x80; if (hostapd_drv_send_mlme(hapd, resp, len, 0, NULL, 0, 0) < 0) { wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send " "Action frame"); } os_free(resp); } return 1; } /** * ieee802_11_mgmt - process incoming IEEE 802.11 management frames * @hapd: hostapd BSS data structure (the BSS to which the management frame was * sent to) * @buf: management frame data (starting from IEEE 802.11 header) * @len: length of frame data in octets * @fi: meta data about received frame (signal level, etc.) * * Process all incoming IEEE 802.11 management frames. This will be called for * each frame received from the kernel driver through wlan#ap interface. In * addition, it can be called to re-inserted pending frames (e.g., when using * external RADIUS server as an MAC ACL). */ int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len, struct hostapd_frame_info *fi) { struct ieee80211_mgmt *mgmt; u16 fc, stype; int ret = 0; unsigned int freq; int ssi_signal = fi ? fi->ssi_signal : 0; if (len < 24) return 0; if (fi && fi->freq) freq = fi->freq; else freq = hapd->iface->freq; mgmt = (struct ieee80211_mgmt *) buf; fc = le_to_host16(mgmt->frame_control); stype = WLAN_FC_GET_STYPE(fc); if (is_multicast_ether_addr(mgmt->sa) || is_zero_ether_addr(mgmt->sa) || os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) { /* Do not process any frames with unexpected/invalid SA so that * we do not add any state for unexpected STA addresses or end * up sending out frames to unexpected destination. */ wpa_printf(MSG_DEBUG, "MGMT: Invalid SA=" MACSTR " in received frame - ignore this frame silently", MAC2STR(mgmt->sa)); return 0; } if (stype == WLAN_FC_STYPE_BEACON) { handle_beacon(hapd, mgmt, len, fi); return 1; } if (!is_broadcast_ether_addr(mgmt->bssid) && #ifdef CONFIG_P2P /* Invitation responses can be sent with the peer MAC as BSSID */ !((hapd->conf->p2p & P2P_GROUP_OWNER) && stype == WLAN_FC_STYPE_ACTION) && #endif /* CONFIG_P2P */ #ifdef CONFIG_MESH !(hapd->conf->mesh & MESH_ENABLED) && #endif /* CONFIG_MESH */ os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) { wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address", MAC2STR(mgmt->bssid)); return 0; } if (stype == WLAN_FC_STYPE_PROBE_REQ) { handle_probe_req(hapd, mgmt, len, ssi_signal); return 1; } if ((!is_broadcast_ether_addr(mgmt->da) || stype != WLAN_FC_STYPE_ACTION) && os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) { hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "MGMT: DA=" MACSTR " not our address", MAC2STR(mgmt->da)); return 0; } if (hapd->iconf->track_sta_max_num) sta_track_add(hapd->iface, mgmt->sa, ssi_signal); switch (stype) { case WLAN_FC_STYPE_AUTH: wpa_printf(MSG_DEBUG, "mgmt::auth"); handle_auth(hapd, mgmt, len, ssi_signal, 0); ret = 1; break; case WLAN_FC_STYPE_ASSOC_REQ: wpa_printf(MSG_DEBUG, "mgmt::assoc_req"); handle_assoc(hapd, mgmt, len, 0, ssi_signal); ret = 1; break; case WLAN_FC_STYPE_REASSOC_REQ: wpa_printf(MSG_DEBUG, "mgmt::reassoc_req"); handle_assoc(hapd, mgmt, len, 1, ssi_signal); ret = 1; break; case WLAN_FC_STYPE_DISASSOC: wpa_printf(MSG_DEBUG, "mgmt::disassoc"); handle_disassoc(hapd, mgmt, len); ret = 1; break; case WLAN_FC_STYPE_DEAUTH: wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth"); handle_deauth(hapd, mgmt, len); ret = 1; break; case WLAN_FC_STYPE_ACTION: wpa_printf(MSG_DEBUG, "mgmt::action"); ret = handle_action(hapd, mgmt, len, freq); break; default: hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "unknown mgmt frame subtype %d", stype); break; } return ret; } static void handle_auth_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int ok) { u16 auth_alg, auth_transaction, status_code; struct sta_info *sta; sta = ap_get_sta(hapd, mgmt->da); if (!sta) { wpa_printf(MSG_DEBUG, "handle_auth_cb: STA " MACSTR " not found", MAC2STR(mgmt->da)); return; } auth_alg = le_to_host16(mgmt->u.auth.auth_alg); auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction); status_code = le_to_host16(mgmt->u.auth.status_code); if (!ok) { hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE, "did not acknowledge authentication response"); goto fail; } if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) { wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)", (unsigned long) len); goto fail; } if (status_code == WLAN_STATUS_SUCCESS && ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) || (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) { hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "authenticated"); sta->flags |= WLAN_STA_AUTH; if (sta->added_unassoc) hostapd_set_sta_flags(hapd, sta); return; } fail: if (status_code != WLAN_STATUS_SUCCESS && sta->added_unassoc) { hostapd_drv_sta_remove(hapd, sta->addr); sta->added_unassoc = 0; } } static void hostapd_set_wds_encryption(struct hostapd_data *hapd, struct sta_info *sta, char *ifname_wds) { #ifdef CONFIG_WEP int i; struct hostapd_ssid *ssid = &hapd->conf->ssid; if (hapd->conf->ieee802_1x || hapd->conf->wpa) return; for (i = 0; i < 4; i++) { if (ssid->wep.key[i] && hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i, 0, i == ssid->wep.idx, NULL, 0, ssid->wep.key[i], ssid->wep.len[i], i == ssid->wep.idx ? KEY_FLAG_GROUP_RX_TX_DEFAULT : KEY_FLAG_GROUP_RX_TX)) { wpa_printf(MSG_WARNING, "Could not set WEP keys for WDS interface; %s", ifname_wds); break; } } #endif /* CONFIG_WEP */ } static void handle_assoc_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int reassoc, int ok) { u16 status; struct sta_info *sta; int new_assoc = 1; sta = ap_get_sta(hapd, mgmt->da); if (!sta) { wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found", MAC2STR(mgmt->da)); return; } if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) : sizeof(mgmt->u.assoc_resp))) { wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)", reassoc, (unsigned long) len); hostapd_drv_sta_remove(hapd, sta->addr); return; } if (reassoc) status = le_to_host16(mgmt->u.reassoc_resp.status_code); else status = le_to_host16(mgmt->u.assoc_resp.status_code); if (!ok) { hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_DEBUG, "did not acknowledge association response"); sta->flags &= ~WLAN_STA_ASSOC_REQ_OK; /* The STA is added only in case of SUCCESS */ if (status == WLAN_STATUS_SUCCESS) hostapd_drv_sta_remove(hapd, sta->addr); return; } if (status != WLAN_STATUS_SUCCESS) return; /* Stop previous accounting session, if one is started, and allocate * new session id for the new session. */ accounting_sta_stop(hapd, sta); hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_INFO, "associated (aid %d)", sta->aid); if (sta->flags & WLAN_STA_ASSOC) new_assoc = 0; sta->flags |= WLAN_STA_ASSOC; sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) || sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK || sta->auth_alg == WLAN_AUTH_FT) { /* * Open, static WEP, FT protocol, or FILS; no separate * authorization step. */ ap_sta_set_authorized(hapd, sta, 1); } if (reassoc) mlme_reassociate_indication(hapd, sta); else mlme_associate_indication(hapd, sta); sta->sa_query_timed_out = 0; if (sta->eapol_sm == NULL) { /* * This STA does not use RADIUS server for EAP authentication, * so bind it to the selected VLAN interface now, since the * interface selection is not going to change anymore. */ if (ap_sta_bind_vlan(hapd, sta) < 0) return; } else if (sta->vlan_id) { /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */ if (ap_sta_bind_vlan(hapd, sta) < 0) return; } hostapd_set_sta_flags(hapd, sta); if (!(sta->flags & WLAN_STA_WDS) && sta->pending_wds_enable) { wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for STA " MACSTR " based on pending request", MAC2STR(sta->addr)); sta->pending_wds_enable = 0; sta->flags |= WLAN_STA_WDS; } if (sta->flags & (WLAN_STA_WDS | WLAN_STA_MULTI_AP)) { int ret; char ifname_wds[IFNAMSIZ + 1]; wpa_printf(MSG_DEBUG, "Reenable 4-address WDS mode for STA " MACSTR " (aid %u)", MAC2STR(sta->addr), sta->aid); ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, sta->aid, 1); if (!ret) hostapd_set_wds_encryption(hapd, sta, ifname_wds); } if (sta->auth_alg == WLAN_AUTH_FT) wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); else wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); hapd->new_assoc_sta_cb(hapd, sta, !new_assoc); ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); #ifdef CONFIG_FILS if ((sta->auth_alg == WLAN_AUTH_FILS_SK || sta->auth_alg == WLAN_AUTH_FILS_SK_PFS || sta->auth_alg == WLAN_AUTH_FILS_PK) && fils_set_tk(sta->wpa_sm) < 0) { wpa_printf(MSG_DEBUG, "FILS: TK configuration failed"); ap_sta_disconnect(hapd, sta, sta->addr, WLAN_REASON_UNSPECIFIED); return; } #endif /* CONFIG_FILS */ if (sta->pending_eapol_rx) { struct os_reltime now, age; os_get_reltime(&now); os_reltime_sub(&now, &sta->pending_eapol_rx->rx_time, &age); if (age.sec == 0 && age.usec < 200000) { wpa_printf(MSG_DEBUG, "Process pending EAPOL frame that was received from " MACSTR " just before association notification", MAC2STR(sta->addr)); ieee802_1x_receive( hapd, mgmt->da, wpabuf_head(sta->pending_eapol_rx->buf), wpabuf_len(sta->pending_eapol_rx->buf)); } wpabuf_free(sta->pending_eapol_rx->buf); os_free(sta->pending_eapol_rx); sta->pending_eapol_rx = NULL; } } static void handle_deauth_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int ok) { struct sta_info *sta; if (is_multicast_ether_addr(mgmt->da)) return; sta = ap_get_sta(hapd, mgmt->da); if (!sta) { wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR " not found", MAC2STR(mgmt->da)); return; } if (ok) wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth", MAC2STR(sta->addr)); else wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " "deauth", MAC2STR(sta->addr)); ap_sta_deauth_cb(hapd, sta); } static void handle_disassoc_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int ok) { struct sta_info *sta; if (is_multicast_ether_addr(mgmt->da)) return; sta = ap_get_sta(hapd, mgmt->da); if (!sta) { wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR " not found", MAC2STR(mgmt->da)); return; } if (ok) wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc", MAC2STR(sta->addr)); else wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge " "disassoc", MAC2STR(sta->addr)); ap_sta_disassoc_cb(hapd, sta); } static void handle_action_cb(struct hostapd_data *hapd, const struct ieee80211_mgmt *mgmt, size_t len, int ok) { struct sta_info *sta; const struct rrm_measurement_report_element *report; if (is_multicast_ether_addr(mgmt->da)) return; #ifdef CONFIG_DPP if (len >= IEEE80211_HDRLEN + 6 && mgmt->u.action.category == WLAN_ACTION_PUBLIC && mgmt->u.action.u.vs_public_action.action == WLAN_PA_VENDOR_SPECIFIC && WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) == OUI_WFA && mgmt->u.action.u.vs_public_action.variable[0] == DPP_OUI_TYPE) { const u8 *pos, *end; pos = &mgmt->u.action.u.vs_public_action.variable[1]; end = ((const u8 *) mgmt) + len; hostapd_dpp_tx_status(hapd, mgmt->da, pos, end - pos, ok); return; } if (len >= IEEE80211_HDRLEN + 2 && mgmt->u.action.category == WLAN_ACTION_PUBLIC && (mgmt->u.action.u.public_action.action == WLAN_PA_GAS_INITIAL_REQ || mgmt->u.action.u.public_action.action == WLAN_PA_GAS_COMEBACK_REQ)) { const u8 *pos, *end; pos = mgmt->u.action.u.public_action.variable; end = ((const u8 *) mgmt) + len; gas_query_ap_tx_status(hapd->gas, mgmt->da, pos, end - pos, ok); return; } #endif /* CONFIG_DPP */ sta = ap_get_sta(hapd, mgmt->da); if (!sta) { wpa_printf(MSG_DEBUG, "handle_action_cb: STA " MACSTR " not found", MAC2STR(mgmt->da)); return; } if (len < 24 + 5 + sizeof(*report)) return; report = (const struct rrm_measurement_report_element *) &mgmt->u.action.u.rrm.variable[2]; if (mgmt->u.action.category == WLAN_ACTION_RADIO_MEASUREMENT && mgmt->u.action.u.rrm.action == WLAN_RRM_RADIO_MEASUREMENT_REQUEST && report->eid == WLAN_EID_MEASURE_REQUEST && report->len >= 3 && report->type == MEASURE_TYPE_BEACON) hostapd_rrm_beacon_req_tx_status(hapd, mgmt, len, ok); } /** * ieee802_11_mgmt_cb - Process management frame TX status callback * @hapd: hostapd BSS data structure (the BSS from which the management frame * was sent from) * @buf: management frame data (starting from IEEE 802.11 header) * @len: length of frame data in octets * @stype: management frame subtype from frame control field * @ok: Whether the frame was ACK'ed */ void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len, u16 stype, int ok) { const struct ieee80211_mgmt *mgmt; mgmt = (const struct ieee80211_mgmt *) buf; #ifdef CONFIG_TESTING_OPTIONS if (hapd->ext_mgmt_frame_handling) { size_t hex_len = 2 * len + 1; char *hex = os_malloc(hex_len); if (hex) { wpa_snprintf_hex(hex, hex_len, buf, len); wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d buf=%s", stype, ok, hex); os_free(hex); } return; } #endif /* CONFIG_TESTING_OPTIONS */ switch (stype) { case WLAN_FC_STYPE_AUTH: wpa_printf(MSG_DEBUG, "mgmt::auth cb"); handle_auth_cb(hapd, mgmt, len, ok); break; case WLAN_FC_STYPE_ASSOC_RESP: wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb"); handle_assoc_cb(hapd, mgmt, len, 0, ok); break; case WLAN_FC_STYPE_REASSOC_RESP: wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb"); handle_assoc_cb(hapd, mgmt, len, 1, ok); break; case WLAN_FC_STYPE_PROBE_RESP: wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb ok=%d", ok); break; case WLAN_FC_STYPE_DEAUTH: wpa_printf(MSG_DEBUG, "mgmt::deauth cb"); handle_deauth_cb(hapd, mgmt, len, ok); break; case WLAN_FC_STYPE_DISASSOC: wpa_printf(MSG_DEBUG, "mgmt::disassoc cb"); handle_disassoc_cb(hapd, mgmt, len, ok); break; case WLAN_FC_STYPE_ACTION: wpa_printf(MSG_DEBUG, "mgmt::action cb ok=%d", ok); handle_action_cb(hapd, mgmt, len, ok); break; default: wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype); break; } } int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen) { /* TODO */ return 0; } int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta, char *buf, size_t buflen) { /* TODO */ return 0; } void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr, const u8 *buf, size_t len, int ack) { struct sta_info *sta; struct hostapd_iface *iface = hapd->iface; sta = ap_get_sta(hapd, addr); if (sta == NULL && iface->num_bss > 1) { size_t j; for (j = 0; j < iface->num_bss; j++) { hapd = iface->bss[j]; sta = ap_get_sta(hapd, addr); if (sta) break; } } if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) return; if (sta->flags & WLAN_STA_PENDING_POLL) { wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending " "activity poll", MAC2STR(sta->addr), ack ? "ACKed" : "did not ACK"); if (ack) sta->flags &= ~WLAN_STA_PENDING_POLL; } ieee802_1x_tx_status(hapd, sta, buf, len, ack); } void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst, const u8 *data, size_t len, int ack) { struct sta_info *sta; struct hostapd_iface *iface = hapd->iface; sta = ap_get_sta(hapd, dst); if (sta == NULL && iface->num_bss > 1) { size_t j; for (j = 0; j < iface->num_bss; j++) { hapd = iface->bss[j]; sta = ap_get_sta(hapd, dst); if (sta) break; } } if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA " MACSTR " that is not currently associated", MAC2STR(dst)); return; } ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack); } void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr) { struct sta_info *sta; struct hostapd_iface *iface = hapd->iface; sta = ap_get_sta(hapd, addr); if (sta == NULL && iface->num_bss > 1) { size_t j; for (j = 0; j < iface->num_bss; j++) { hapd = iface->bss[j]; sta = ap_get_sta(hapd, addr); if (sta) break; } } if (sta == NULL) return; wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POLL_OK MACSTR, MAC2STR(sta->addr)); if (!(sta->flags & WLAN_STA_PENDING_POLL)) return; wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending " "activity poll", MAC2STR(sta->addr)); sta->flags &= ~WLAN_STA_PENDING_POLL; } void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src, int wds) { struct sta_info *sta; sta = ap_get_sta(hapd, src); if (sta && ((sta->flags & WLAN_STA_ASSOC) || ((sta->flags & WLAN_STA_ASSOC_REQ_OK) && wds))) { if (!hapd->conf->wds_sta) return; if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK)) == WLAN_STA_ASSOC_REQ_OK) { wpa_printf(MSG_DEBUG, "Postpone 4-address WDS mode enabling for STA " MACSTR " since TX status for AssocResp is not yet known", MAC2STR(sta->addr)); sta->pending_wds_enable = 1; return; } if (wds && !(sta->flags & WLAN_STA_WDS)) { int ret; char ifname_wds[IFNAMSIZ + 1]; wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for " "STA " MACSTR " (aid %u)", MAC2STR(sta->addr), sta->aid); sta->flags |= WLAN_STA_WDS; ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr, sta->aid, 1); if (!ret) hostapd_set_wds_encryption(hapd, sta, ifname_wds); } return; } wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA " MACSTR, MAC2STR(src)); if (is_multicast_ether_addr(src) || is_zero_ether_addr(src) || os_memcmp(src, hapd->own_addr, ETH_ALEN) == 0) { /* Broadcast bit set in SA or unexpected SA?! Ignore the frame * silently. */ return; } if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) { wpa_printf(MSG_DEBUG, "Association Response to the STA has " "already been sent, but no TX status yet known - " "ignore Class 3 frame issue with " MACSTR, MAC2STR(src)); return; } if (sta && (sta->flags & WLAN_STA_AUTH)) hostapd_drv_sta_disassoc( hapd, src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); else hostapd_drv_sta_deauth( hapd, src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); } #endif /* CONFIG_NATIVE_WINDOWS */