/* * wpa_supplicant - DPP * Copyright (c) 2017, Qualcomm Atheros, Inc. * Copyright (c) 2018-2019, The Linux Foundation * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "utils/includes.h" #include "utils/common.h" #include "utils/eloop.h" #include "utils/ip_addr.h" #include "common/dpp.h" #include "common/gas.h" #include "common/gas_server.h" #include "rsn_supp/wpa.h" #include "rsn_supp/pmksa_cache.h" #include "wpa_supplicant_i.h" #include "config.h" #include "driver_i.h" #include "offchannel.h" #include "gas_query.h" #include "bss.h" #include "scan.h" #include "notify.h" #include "dpp_supplicant.h" static int wpas_dpp_listen_start(struct wpa_supplicant *wpa_s, unsigned int freq); static void wpas_dpp_reply_wait_timeout(void *eloop_ctx, void *timeout_ctx); static void wpas_dpp_auth_success(struct wpa_supplicant *wpa_s, int initiator); static void wpas_dpp_tx_status(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *data, size_t data_len, enum offchannel_send_action_result result); static void wpas_dpp_init_timeout(void *eloop_ctx, void *timeout_ctx); static int wpas_dpp_auth_init_next(struct wpa_supplicant *wpa_s); static void wpas_dpp_tx_pkex_status(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *data, size_t data_len, enum offchannel_send_action_result result); static const u8 broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; /* Use a hardcoded Transaction ID 1 in Peer Discovery frames since there is only * a single transaction in progress at any point in time. */ static const u8 TRANSACTION_ID = 1; /** * wpas_dpp_qr_code - Parse and add DPP bootstrapping info from a QR Code * @wpa_s: Pointer to wpa_supplicant data * @cmd: DPP URI read from a QR Code * Returns: Identifier of the stored info or -1 on failure */ int wpas_dpp_qr_code(struct wpa_supplicant *wpa_s, const char *cmd) { struct dpp_bootstrap_info *bi; struct dpp_authentication *auth = wpa_s->dpp_auth; bi = dpp_add_qr_code(wpa_s->dpp, cmd); if (!bi) return -1; if (auth && auth->response_pending && dpp_notify_new_qr_code(auth, bi) == 1) { wpa_printf(MSG_DEBUG, "DPP: Sending out pending authentication response"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(auth->peer_mac_addr), auth->curr_freq, DPP_PA_AUTHENTICATION_RESP); offchannel_send_action(wpa_s, auth->curr_freq, auth->peer_mac_addr, wpa_s->own_addr, broadcast, wpabuf_head(auth->resp_msg), wpabuf_len(auth->resp_msg), 500, wpas_dpp_tx_status, 0); } return bi->id; } /** * wpas_dpp_nfc_uri - Parse and add DPP bootstrapping info from NFC Tag (URI) * @wpa_s: Pointer to wpa_supplicant data * @cmd: DPP URI read from a NFC Tag (URI NDEF message) * Returns: Identifier of the stored info or -1 on failure */ int wpas_dpp_nfc_uri(struct wpa_supplicant *wpa_s, const char *cmd) { struct dpp_bootstrap_info *bi; bi = dpp_add_nfc_uri(wpa_s->dpp, cmd); if (!bi) return -1; return bi->id; } static void wpas_dpp_auth_resp_retry_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; if (!auth || !auth->resp_msg) return; wpa_printf(MSG_DEBUG, "DPP: Retry Authentication Response after timeout"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(auth->peer_mac_addr), auth->curr_freq, DPP_PA_AUTHENTICATION_RESP); offchannel_send_action(wpa_s, auth->curr_freq, auth->peer_mac_addr, wpa_s->own_addr, broadcast, wpabuf_head(auth->resp_msg), wpabuf_len(auth->resp_msg), 500, wpas_dpp_tx_status, 0); } static void wpas_dpp_auth_resp_retry(struct wpa_supplicant *wpa_s) { struct dpp_authentication *auth = wpa_s->dpp_auth; unsigned int wait_time, max_tries; if (!auth || !auth->resp_msg) return; if (wpa_s->dpp_resp_max_tries) max_tries = wpa_s->dpp_resp_max_tries; else max_tries = 5; auth->auth_resp_tries++; if (auth->auth_resp_tries >= max_tries) { wpa_printf(MSG_INFO, "DPP: No confirm received from initiator - stopping exchange"); offchannel_send_action_done(wpa_s); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; return; } if (wpa_s->dpp_resp_retry_time) wait_time = wpa_s->dpp_resp_retry_time; else wait_time = 1000; wpa_printf(MSG_DEBUG, "DPP: Schedule retransmission of Authentication Response frame in %u ms", wait_time); eloop_cancel_timeout(wpas_dpp_auth_resp_retry_timeout, wpa_s, NULL); eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000, wpas_dpp_auth_resp_retry_timeout, wpa_s, NULL); } static void wpas_dpp_try_to_connect(struct wpa_supplicant *wpa_s) { wpa_printf(MSG_DEBUG, "DPP: Trying to connect to the new network"); wpa_s->suitable_network = 0; wpa_s->no_suitable_network = 0; wpa_s->disconnected = 0; wpa_s->reassociate = 1; wpa_s->scan_runs = 0; wpa_s->normal_scans = 0; wpa_supplicant_cancel_sched_scan(wpa_s); wpa_supplicant_req_scan(wpa_s, 0, 0); } #ifdef CONFIG_DPP2 static void wpas_dpp_conn_status_result_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; enum dpp_status_error result; if (!auth || !auth->conn_status_requested) return; wpa_printf(MSG_DEBUG, "DPP: Connection timeout - report Connection Status Result"); if (wpa_s->suitable_network) result = DPP_STATUS_AUTH_FAILURE; else if (wpa_s->no_suitable_network) result = DPP_STATUS_NO_AP; else result = 255; /* What to report here for unexpected state? */ wpas_dpp_send_conn_status_result(wpa_s, result); } static char * wpas_dpp_scan_channel_list(struct wpa_supplicant *wpa_s) { char *str, *end, *pos; size_t len; unsigned int i; u8 last_op_class = 0; int res; if (!wpa_s->last_scan_freqs || !wpa_s->num_last_scan_freqs) return NULL; len = wpa_s->num_last_scan_freqs * 8; str = os_zalloc(len); if (!str) return NULL; end = str + len; pos = str; for (i = 0; i < wpa_s->num_last_scan_freqs; i++) { enum hostapd_hw_mode mode; u8 op_class, channel; mode = ieee80211_freq_to_channel_ext(wpa_s->last_scan_freqs[i], 0, 0, &op_class, &channel); if (mode == NUM_HOSTAPD_MODES) continue; if (op_class == last_op_class) res = os_snprintf(pos, end - pos, ",%d", channel); else res = os_snprintf(pos, end - pos, "%s%d/%d", pos == str ? "" : ",", op_class, channel); if (os_snprintf_error(end - pos, res)) { *pos = '\0'; break; } pos += res; last_op_class = op_class; } if (pos == str) { os_free(str); str = NULL; } return str; } void wpas_dpp_send_conn_status_result(struct wpa_supplicant *wpa_s, enum dpp_status_error result) { struct wpabuf *msg; const char *channel_list = NULL; char *channel_list_buf = NULL; struct wpa_ssid *ssid = wpa_s->current_ssid; struct dpp_authentication *auth = wpa_s->dpp_auth; eloop_cancel_timeout(wpas_dpp_conn_status_result_timeout, wpa_s, NULL); if (!auth || !auth->conn_status_requested) return; auth->conn_status_requested = 0; wpa_printf(MSG_DEBUG, "DPP: Report connection status result %d", result); if (result == DPP_STATUS_NO_AP) { channel_list_buf = wpas_dpp_scan_channel_list(wpa_s); channel_list = channel_list_buf; } msg = dpp_build_conn_status_result(auth, result, ssid ? ssid->ssid : wpa_s->dpp_last_ssid, ssid ? ssid->ssid_len : wpa_s->dpp_last_ssid_len, channel_list); os_free(channel_list_buf); if (!msg) { dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; return; } wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(auth->peer_mac_addr), auth->curr_freq, DPP_PA_CONNECTION_STATUS_RESULT); offchannel_send_action(wpa_s, auth->curr_freq, auth->peer_mac_addr, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), 500, wpas_dpp_tx_status, 0); wpabuf_free(msg); /* This exchange will be terminated in the TX status handler */ auth->remove_on_tx_status = 1; return; } void wpas_dpp_connected(struct wpa_supplicant *wpa_s) { struct dpp_authentication *auth = wpa_s->dpp_auth; if (auth && auth->conn_status_requested) wpas_dpp_send_conn_status_result(wpa_s, DPP_STATUS_OK); } #endif /* CONFIG_DPP2 */ static void wpas_dpp_tx_status(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *data, size_t data_len, enum offchannel_send_action_result result) { const char *res_txt; struct dpp_authentication *auth = wpa_s->dpp_auth; res_txt = result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" : (result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" : "FAILED"); wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR " result=%s", freq, MAC2STR(dst), res_txt); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX_STATUS "dst=" MACSTR " freq=%u result=%s", MAC2STR(dst), freq, res_txt); if (!wpa_s->dpp_auth) { wpa_printf(MSG_DEBUG, "DPP: Ignore TX status since there is no ongoing authentication exchange"); return; } #ifdef CONFIG_DPP2 if (auth->connect_on_tx_status) { auth->connect_on_tx_status = 0; wpa_printf(MSG_DEBUG, "DPP: Try to connect after completed configuration result"); wpas_dpp_try_to_connect(wpa_s); if (auth->conn_status_requested) { wpa_printf(MSG_DEBUG, "DPP: Start 15 second timeout for reporting connection status result"); eloop_cancel_timeout( wpas_dpp_conn_status_result_timeout, wpa_s, NULL); eloop_register_timeout( 15, 0, wpas_dpp_conn_status_result_timeout, wpa_s, NULL); } else { dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; } return; } #endif /* CONFIG_DPP2 */ if (wpa_s->dpp_auth->remove_on_tx_status) { wpa_printf(MSG_DEBUG, "DPP: Terminate authentication exchange due to a request to do so on TX status"); eloop_cancel_timeout(wpas_dpp_init_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_auth_resp_retry_timeout, wpa_s, NULL); offchannel_send_action_done(wpa_s); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; return; } if (wpa_s->dpp_auth_ok_on_ack) wpas_dpp_auth_success(wpa_s, 1); if (!is_broadcast_ether_addr(dst) && result != OFFCHANNEL_SEND_ACTION_SUCCESS) { wpa_printf(MSG_DEBUG, "DPP: Unicast DPP Action frame was not ACKed"); if (auth->waiting_auth_resp) { /* In case of DPP Authentication Request frame, move to * the next channel immediately. */ offchannel_send_action_done(wpa_s); wpas_dpp_auth_init_next(wpa_s); return; } if (auth->waiting_auth_conf) { wpas_dpp_auth_resp_retry(wpa_s); return; } } if (!is_broadcast_ether_addr(dst) && auth->waiting_auth_resp && result == OFFCHANNEL_SEND_ACTION_SUCCESS) { /* Allow timeout handling to stop iteration if no response is * received from a peer that has ACKed a request. */ auth->auth_req_ack = 1; } if (!wpa_s->dpp_auth_ok_on_ack && wpa_s->dpp_auth->neg_freq > 0 && wpa_s->dpp_auth->curr_freq != wpa_s->dpp_auth->neg_freq) { wpa_printf(MSG_DEBUG, "DPP: Move from curr_freq %u MHz to neg_freq %u MHz for response", wpa_s->dpp_auth->curr_freq, wpa_s->dpp_auth->neg_freq); offchannel_send_action_done(wpa_s); wpas_dpp_listen_start(wpa_s, wpa_s->dpp_auth->neg_freq); } if (wpa_s->dpp_auth_ok_on_ack) wpa_s->dpp_auth_ok_on_ack = 0; } static void wpas_dpp_reply_wait_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; unsigned int freq; struct os_reltime now, diff; unsigned int wait_time, diff_ms; if (!auth || !auth->waiting_auth_resp) return; wait_time = wpa_s->dpp_resp_wait_time ? wpa_s->dpp_resp_wait_time : 2000; os_get_reltime(&now); os_reltime_sub(&now, &wpa_s->dpp_last_init, &diff); diff_ms = diff.sec * 1000 + diff.usec / 1000; wpa_printf(MSG_DEBUG, "DPP: Reply wait timeout - wait_time=%u diff_ms=%u", wait_time, diff_ms); if (auth->auth_req_ack && diff_ms >= wait_time) { /* Peer ACK'ed Authentication Request frame, but did not reply * with Authentication Response frame within two seconds. */ wpa_printf(MSG_INFO, "DPP: No response received from responder - stopping initiation attempt"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_AUTH_INIT_FAILED); offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); dpp_auth_deinit(auth); wpa_s->dpp_auth = NULL; return; } if (diff_ms >= wait_time) { /* Authentication Request frame was not ACK'ed and no reply * was receiving within two seconds. */ wpa_printf(MSG_DEBUG, "DPP: Continue Initiator channel iteration"); offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); wpas_dpp_auth_init_next(wpa_s); return; } /* Driver did not support 2000 ms long wait_time with TX command, so * schedule listen operation to continue waiting for the response. * * DPP listen operations continue until stopped, so simply schedule a * new call to this function at the point when the two second reply * wait has expired. */ wait_time -= diff_ms; freq = auth->curr_freq; if (auth->neg_freq > 0) freq = auth->neg_freq; wpa_printf(MSG_DEBUG, "DPP: Continue reply wait on channel %u MHz for %u ms", freq, wait_time); wpa_s->dpp_in_response_listen = 1; wpas_dpp_listen_start(wpa_s, freq); eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000, wpas_dpp_reply_wait_timeout, wpa_s, NULL); } static void wpas_dpp_set_testing_options(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth) { #ifdef CONFIG_TESTING_OPTIONS if (wpa_s->dpp_config_obj_override) auth->config_obj_override = os_strdup(wpa_s->dpp_config_obj_override); if (wpa_s->dpp_discovery_override) auth->discovery_override = os_strdup(wpa_s->dpp_discovery_override); if (wpa_s->dpp_groups_override) auth->groups_override = os_strdup(wpa_s->dpp_groups_override); auth->ignore_netaccesskey_mismatch = wpa_s->dpp_ignore_netaccesskey_mismatch; #endif /* CONFIG_TESTING_OPTIONS */ } static void wpas_dpp_init_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (!wpa_s->dpp_auth) return; wpa_printf(MSG_DEBUG, "DPP: Retry initiation after timeout"); wpas_dpp_auth_init_next(wpa_s); } static int wpas_dpp_auth_init_next(struct wpa_supplicant *wpa_s) { struct dpp_authentication *auth = wpa_s->dpp_auth; const u8 *dst; unsigned int wait_time, max_wait_time, freq, max_tries, used; struct os_reltime now, diff; wpa_s->dpp_in_response_listen = 0; if (!auth) return -1; if (auth->freq_idx == 0) os_get_reltime(&wpa_s->dpp_init_iter_start); if (auth->freq_idx >= auth->num_freq) { auth->num_freq_iters++; if (wpa_s->dpp_init_max_tries) max_tries = wpa_s->dpp_init_max_tries; else max_tries = 5; if (auth->num_freq_iters >= max_tries || auth->auth_req_ack) { wpa_printf(MSG_INFO, "DPP: No response received from responder - stopping initiation attempt"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_AUTH_INIT_FAILED); eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); offchannel_send_action_done(wpa_s); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; return -1; } auth->freq_idx = 0; eloop_cancel_timeout(wpas_dpp_init_timeout, wpa_s, NULL); if (wpa_s->dpp_init_retry_time) wait_time = wpa_s->dpp_init_retry_time; else wait_time = 10000; os_get_reltime(&now); os_reltime_sub(&now, &wpa_s->dpp_init_iter_start, &diff); used = diff.sec * 1000 + diff.usec / 1000; if (used > wait_time) wait_time = 0; else wait_time -= used; wpa_printf(MSG_DEBUG, "DPP: Next init attempt in %u ms", wait_time); eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000, wpas_dpp_init_timeout, wpa_s, NULL); return 0; } freq = auth->freq[auth->freq_idx++]; auth->curr_freq = freq; if (is_zero_ether_addr(auth->peer_bi->mac_addr)) dst = broadcast; else dst = auth->peer_bi->mac_addr; wpa_s->dpp_auth_ok_on_ack = 0; eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); wait_time = wpa_s->max_remain_on_chan; max_wait_time = wpa_s->dpp_resp_wait_time ? wpa_s->dpp_resp_wait_time : 2000; if (wait_time > max_wait_time) wait_time = max_wait_time; wait_time += 10; /* give the driver some extra time to complete */ eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000, wpas_dpp_reply_wait_timeout, wpa_s, NULL); wait_time -= 10; if (auth->neg_freq > 0 && freq != auth->neg_freq) { wpa_printf(MSG_DEBUG, "DPP: Initiate on %u MHz and move to neg_freq %u MHz for response", freq, auth->neg_freq); } wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(dst), freq, DPP_PA_AUTHENTICATION_REQ); auth->auth_req_ack = 0; os_get_reltime(&wpa_s->dpp_last_init); return offchannel_send_action(wpa_s, freq, dst, wpa_s->own_addr, broadcast, wpabuf_head(auth->req_msg), wpabuf_len(auth->req_msg), wait_time, wpas_dpp_tx_status, 0); } int wpas_dpp_auth_init(struct wpa_supplicant *wpa_s, const char *cmd) { const char *pos; struct dpp_bootstrap_info *peer_bi, *own_bi = NULL; struct dpp_authentication *auth; u8 allowed_roles = DPP_CAPAB_CONFIGURATOR; unsigned int neg_freq = 0; int tcp = 0; #ifdef CONFIG_DPP2 int tcp_port = DPP_TCP_PORT; struct hostapd_ip_addr ipaddr; char *addr; #endif /* CONFIG_DPP2 */ wpa_s->dpp_gas_client = 0; pos = os_strstr(cmd, " peer="); if (!pos) return -1; pos += 6; peer_bi = dpp_bootstrap_get_id(wpa_s->dpp, atoi(pos)); if (!peer_bi) { wpa_printf(MSG_INFO, "DPP: Could not find bootstrapping info for the identified peer"); return -1; } #ifdef CONFIG_DPP2 pos = os_strstr(cmd, " tcp_port="); if (pos) { pos += 10; tcp_port = atoi(pos); } addr = get_param(cmd, " tcp_addr="); if (addr) { int res; res = hostapd_parse_ip_addr(addr, &ipaddr); os_free(addr); if (res) return -1; tcp = 1; } #endif /* CONFIG_DPP2 */ pos = os_strstr(cmd, " own="); if (pos) { pos += 5; own_bi = dpp_bootstrap_get_id(wpa_s->dpp, atoi(pos)); if (!own_bi) { wpa_printf(MSG_INFO, "DPP: Could not find bootstrapping info for the identified local entry"); return -1; } if (peer_bi->curve != own_bi->curve) { wpa_printf(MSG_INFO, "DPP: Mismatching curves in bootstrapping info (peer=%s own=%s)", peer_bi->curve->name, own_bi->curve->name); return -1; } } pos = os_strstr(cmd, " role="); if (pos) { pos += 6; if (os_strncmp(pos, "configurator", 12) == 0) allowed_roles = DPP_CAPAB_CONFIGURATOR; else if (os_strncmp(pos, "enrollee", 8) == 0) allowed_roles = DPP_CAPAB_ENROLLEE; else if (os_strncmp(pos, "either", 6) == 0) allowed_roles = DPP_CAPAB_CONFIGURATOR | DPP_CAPAB_ENROLLEE; else goto fail; } pos = os_strstr(cmd, " netrole="); if (pos) { pos += 9; if (os_strncmp(pos, "ap", 2) == 0) wpa_s->dpp_netrole = DPP_NETROLE_AP; else wpa_s->dpp_netrole = DPP_NETROLE_STA; } pos = os_strstr(cmd, " neg_freq="); if (pos) neg_freq = atoi(pos + 10); if (!tcp && wpa_s->dpp_auth) { eloop_cancel_timeout(wpas_dpp_init_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_auth_resp_retry_timeout, wpa_s, NULL); offchannel_send_action_done(wpa_s); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; } auth = dpp_auth_init(wpa_s, peer_bi, own_bi, allowed_roles, neg_freq, wpa_s->hw.modes, wpa_s->hw.num_modes); if (!auth) goto fail; wpas_dpp_set_testing_options(wpa_s, auth); if (dpp_set_configurator(wpa_s->dpp, wpa_s, auth, cmd) < 0) { dpp_auth_deinit(auth); goto fail; } auth->neg_freq = neg_freq; if (!is_zero_ether_addr(peer_bi->mac_addr)) os_memcpy(auth->peer_mac_addr, peer_bi->mac_addr, ETH_ALEN); #ifdef CONFIG_DPP2 if (tcp) return dpp_tcp_init(wpa_s->dpp, auth, &ipaddr, tcp_port); #endif /* CONFIG_DPP2 */ wpa_s->dpp_auth = auth; return wpas_dpp_auth_init_next(wpa_s); fail: return -1; } struct wpas_dpp_listen_work { unsigned int freq; unsigned int duration; struct wpabuf *probe_resp_ie; }; static void wpas_dpp_listen_work_free(struct wpas_dpp_listen_work *lwork) { if (!lwork) return; os_free(lwork); } static void wpas_dpp_listen_work_done(struct wpa_supplicant *wpa_s) { struct wpas_dpp_listen_work *lwork; if (!wpa_s->dpp_listen_work) return; lwork = wpa_s->dpp_listen_work->ctx; wpas_dpp_listen_work_free(lwork); radio_work_done(wpa_s->dpp_listen_work); wpa_s->dpp_listen_work = NULL; } static void dpp_start_listen_cb(struct wpa_radio_work *work, int deinit) { struct wpa_supplicant *wpa_s = work->wpa_s; struct wpas_dpp_listen_work *lwork = work->ctx; if (deinit) { if (work->started) { wpa_s->dpp_listen_work = NULL; wpas_dpp_listen_stop(wpa_s); } wpas_dpp_listen_work_free(lwork); return; } wpa_s->dpp_listen_work = work; wpa_s->dpp_pending_listen_freq = lwork->freq; if (wpa_drv_remain_on_channel(wpa_s, lwork->freq, wpa_s->max_remain_on_chan) < 0) { wpa_printf(MSG_DEBUG, "DPP: Failed to request the driver to remain on channel (%u MHz) for listen", lwork->freq); wpa_s->dpp_listen_freq = 0; wpas_dpp_listen_work_done(wpa_s); wpa_s->dpp_pending_listen_freq = 0; return; } wpa_s->off_channel_freq = 0; wpa_s->roc_waiting_drv_freq = lwork->freq; } static int wpas_dpp_listen_start(struct wpa_supplicant *wpa_s, unsigned int freq) { struct wpas_dpp_listen_work *lwork; if (wpa_s->dpp_listen_work) { wpa_printf(MSG_DEBUG, "DPP: Reject start_listen since dpp_listen_work already exists"); return -1; } if (wpa_s->dpp_listen_freq) wpas_dpp_listen_stop(wpa_s); wpa_s->dpp_listen_freq = freq; lwork = os_zalloc(sizeof(*lwork)); if (!lwork) return -1; lwork->freq = freq; if (radio_add_work(wpa_s, freq, "dpp-listen", 0, dpp_start_listen_cb, lwork) < 0) { wpas_dpp_listen_work_free(lwork); return -1; } return 0; } int wpas_dpp_listen(struct wpa_supplicant *wpa_s, const char *cmd) { int freq; freq = atoi(cmd); if (freq <= 0) return -1; if (os_strstr(cmd, " role=configurator")) wpa_s->dpp_allowed_roles = DPP_CAPAB_CONFIGURATOR; else if (os_strstr(cmd, " role=enrollee")) wpa_s->dpp_allowed_roles = DPP_CAPAB_ENROLLEE; else wpa_s->dpp_allowed_roles = DPP_CAPAB_CONFIGURATOR | DPP_CAPAB_ENROLLEE; wpa_s->dpp_qr_mutual = os_strstr(cmd, " qr=mutual") != NULL; if (os_strstr(cmd, " netrole=ap")) wpa_s->dpp_netrole = DPP_NETROLE_AP; else wpa_s->dpp_netrole = DPP_NETROLE_STA; if (wpa_s->dpp_listen_freq == (unsigned int) freq) { wpa_printf(MSG_DEBUG, "DPP: Already listening on %u MHz", freq); return 0; } return wpas_dpp_listen_start(wpa_s, freq); } void wpas_dpp_listen_stop(struct wpa_supplicant *wpa_s) { wpa_s->dpp_in_response_listen = 0; if (!wpa_s->dpp_listen_freq) return; wpa_printf(MSG_DEBUG, "DPP: Stop listen on %u MHz", wpa_s->dpp_listen_freq); wpa_drv_cancel_remain_on_channel(wpa_s); wpa_s->dpp_listen_freq = 0; wpas_dpp_listen_work_done(wpa_s); } void wpas_dpp_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s, unsigned int freq) { wpas_dpp_listen_work_done(wpa_s); if (wpa_s->dpp_auth && wpa_s->dpp_in_response_listen) { unsigned int new_freq; /* Continue listen with a new remain-on-channel */ if (wpa_s->dpp_auth->neg_freq > 0) new_freq = wpa_s->dpp_auth->neg_freq; else new_freq = wpa_s->dpp_auth->curr_freq; wpa_printf(MSG_DEBUG, "DPP: Continue wait on %u MHz for the ongoing DPP provisioning session", new_freq); wpas_dpp_listen_start(wpa_s, new_freq); return; } if (wpa_s->dpp_listen_freq) { /* Continue listen with a new remain-on-channel */ wpas_dpp_listen_start(wpa_s, wpa_s->dpp_listen_freq); } } static void wpas_dpp_rx_auth_req(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len, unsigned int freq) { const u8 *r_bootstrap, *i_bootstrap; u16 r_bootstrap_len, i_bootstrap_len; struct dpp_bootstrap_info *own_bi = NULL, *peer_bi = NULL; if (!wpa_s->dpp) return; wpa_printf(MSG_DEBUG, "DPP: Authentication Request from " MACSTR, MAC2STR(src)); r_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_R_BOOTSTRAP_KEY_HASH, &r_bootstrap_len); if (!r_bootstrap || r_bootstrap_len != SHA256_MAC_LEN) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_FAIL "Missing or invalid required Responder Bootstrapping Key Hash attribute"); return; } wpa_hexdump(MSG_MSGDUMP, "DPP: Responder Bootstrapping Key Hash", r_bootstrap, r_bootstrap_len); i_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_I_BOOTSTRAP_KEY_HASH, &i_bootstrap_len); if (!i_bootstrap || i_bootstrap_len != SHA256_MAC_LEN) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_FAIL "Missing or invalid required Initiator Bootstrapping Key Hash attribute"); return; } wpa_hexdump(MSG_MSGDUMP, "DPP: Initiator Bootstrapping Key Hash", i_bootstrap, i_bootstrap_len); /* Try to find own and peer bootstrapping key matches based on the * received hash values */ dpp_bootstrap_find_pair(wpa_s->dpp, i_bootstrap, r_bootstrap, &own_bi, &peer_bi); if (!own_bi) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_FAIL "No matching own bootstrapping key found - ignore message"); return; } if (wpa_s->dpp_auth) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_FAIL "Already in DPP authentication exchange - ignore new one"); return; } wpa_s->dpp_gas_client = 0; wpa_s->dpp_auth_ok_on_ack = 0; wpa_s->dpp_auth = dpp_auth_req_rx(wpa_s, wpa_s->dpp_allowed_roles, wpa_s->dpp_qr_mutual, peer_bi, own_bi, freq, hdr, buf, len); if (!wpa_s->dpp_auth) { wpa_printf(MSG_DEBUG, "DPP: No response generated"); return; } wpas_dpp_set_testing_options(wpa_s, wpa_s->dpp_auth); if (dpp_set_configurator(wpa_s->dpp, wpa_s, wpa_s->dpp_auth, wpa_s->dpp_configurator_params) < 0) { dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; return; } os_memcpy(wpa_s->dpp_auth->peer_mac_addr, src, ETH_ALEN); if (wpa_s->dpp_listen_freq && wpa_s->dpp_listen_freq != wpa_s->dpp_auth->curr_freq) { wpa_printf(MSG_DEBUG, "DPP: Stop listen on %u MHz to allow response on the request %u MHz", wpa_s->dpp_listen_freq, wpa_s->dpp_auth->curr_freq); wpas_dpp_listen_stop(wpa_s); } wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(src), wpa_s->dpp_auth->curr_freq, DPP_PA_AUTHENTICATION_RESP); offchannel_send_action(wpa_s, wpa_s->dpp_auth->curr_freq, src, wpa_s->own_addr, broadcast, wpabuf_head(wpa_s->dpp_auth->resp_msg), wpabuf_len(wpa_s->dpp_auth->resp_msg), 500, wpas_dpp_tx_status, 0); } static void wpas_dpp_start_gas_server(struct wpa_supplicant *wpa_s) { /* TODO: stop wait and start ROC */ } static struct wpa_ssid * wpas_dpp_add_network(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth, struct dpp_config_obj *conf) { struct wpa_ssid *ssid; #ifdef CONFIG_DPP2 if (conf->akm == DPP_AKM_SAE) { #ifdef CONFIG_SAE struct wpa_driver_capa capa; int res; res = wpa_drv_get_capa(wpa_s, &capa); if (res == 0 && !(capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_SAE) && !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SAE)) { wpa_printf(MSG_DEBUG, "DPP: SAE not supported by the driver"); return NULL; } #else /* CONFIG_SAE */ wpa_printf(MSG_DEBUG, "DPP: SAE not supported in the build"); return NULL; #endif /* CONFIG_SAE */ } #endif /* CONFIG_DPP2 */ ssid = wpa_config_add_network(wpa_s->conf); if (!ssid) return NULL; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->disabled = 1; ssid->ssid = os_malloc(conf->ssid_len); if (!ssid->ssid) goto fail; os_memcpy(ssid->ssid, conf->ssid, conf->ssid_len); ssid->ssid_len = conf->ssid_len; if (conf->connector) { ssid->key_mgmt = WPA_KEY_MGMT_DPP; ssid->ieee80211w = MGMT_FRAME_PROTECTION_REQUIRED; ssid->dpp_connector = os_strdup(conf->connector); if (!ssid->dpp_connector) goto fail; } if (conf->c_sign_key) { ssid->dpp_csign = os_malloc(wpabuf_len(conf->c_sign_key)); if (!ssid->dpp_csign) goto fail; os_memcpy(ssid->dpp_csign, wpabuf_head(conf->c_sign_key), wpabuf_len(conf->c_sign_key)); ssid->dpp_csign_len = wpabuf_len(conf->c_sign_key); } if (auth->net_access_key) { ssid->dpp_netaccesskey = os_malloc(wpabuf_len(auth->net_access_key)); if (!ssid->dpp_netaccesskey) goto fail; os_memcpy(ssid->dpp_netaccesskey, wpabuf_head(auth->net_access_key), wpabuf_len(auth->net_access_key)); ssid->dpp_netaccesskey_len = wpabuf_len(auth->net_access_key); ssid->dpp_netaccesskey_expiry = auth->net_access_key_expiry; } if (!conf->connector || dpp_akm_psk(conf->akm) || dpp_akm_sae(conf->akm)) { if (!conf->connector) ssid->key_mgmt = 0; if (dpp_akm_psk(conf->akm)) ssid->key_mgmt |= WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_PSK_SHA256 | WPA_KEY_MGMT_FT_PSK; if (dpp_akm_sae(conf->akm)) ssid->key_mgmt |= WPA_KEY_MGMT_SAE | WPA_KEY_MGMT_FT_SAE; ssid->ieee80211w = MGMT_FRAME_PROTECTION_OPTIONAL; if (conf->passphrase[0]) { if (wpa_config_set_quoted(ssid, "psk", conf->passphrase) < 0) goto fail; wpa_config_update_psk(ssid); ssid->export_keys = 1; } else { ssid->psk_set = conf->psk_set; os_memcpy(ssid->psk, conf->psk, PMK_LEN); } } os_memcpy(wpa_s->dpp_last_ssid, conf->ssid, conf->ssid_len); wpa_s->dpp_last_ssid_len = conf->ssid_len; return ssid; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); return NULL; } static int wpas_dpp_process_config(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth, struct dpp_config_obj *conf) { struct wpa_ssid *ssid; if (wpa_s->conf->dpp_config_processing < 1) return 0; ssid = wpas_dpp_add_network(wpa_s, auth, conf); if (!ssid) return -1; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_NETWORK_ID "%d", ssid->id); if (wpa_s->conf->dpp_config_processing == 2) ssid->disabled = 0; #ifndef CONFIG_NO_CONFIG_WRITE if (wpa_s->conf->update_config && wpa_config_write(wpa_s->confname, wpa_s->conf)) wpa_printf(MSG_DEBUG, "DPP: Failed to update configuration"); #endif /* CONFIG_NO_CONFIG_WRITE */ return 0; } static void wpas_dpp_post_process_config(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth) { if (wpa_s->conf->dpp_config_processing < 2) return; #ifdef CONFIG_DPP2 if (auth->peer_version >= 2) { wpa_printf(MSG_DEBUG, "DPP: Postpone connection attempt to wait for completion of DPP Configuration Result"); auth->connect_on_tx_status = 1; return; } #endif /* CONFIG_DPP2 */ wpas_dpp_try_to_connect(wpa_s); } static int wpas_dpp_handle_config_obj(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth, struct dpp_config_obj *conf) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_RECEIVED); if (conf->ssid_len) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONFOBJ_SSID "%s", wpa_ssid_txt(conf->ssid, conf->ssid_len)); if (conf->ssid_charset) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONFOBJ_SSID_CHARSET "%d", conf->ssid_charset); if (conf->connector) { /* TODO: Save the Connector and consider using a command * to fetch the value instead of sending an event with * it. The Connector could end up being larger than what * most clients are ready to receive as an event * message. */ wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONNECTOR "%s", conf->connector); } if (conf->c_sign_key) { char *hex; size_t hexlen; hexlen = 2 * wpabuf_len(conf->c_sign_key) + 1; hex = os_malloc(hexlen); if (hex) { wpa_snprintf_hex(hex, hexlen, wpabuf_head(conf->c_sign_key), wpabuf_len(conf->c_sign_key)); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_C_SIGN_KEY "%s", hex); os_free(hex); } } if (auth->net_access_key) { char *hex; size_t hexlen; hexlen = 2 * wpabuf_len(auth->net_access_key) + 1; hex = os_malloc(hexlen); if (hex) { wpa_snprintf_hex(hex, hexlen, wpabuf_head(auth->net_access_key), wpabuf_len(auth->net_access_key)); if (auth->net_access_key_expiry) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_NET_ACCESS_KEY "%s %lu", hex, (long unsigned) auth->net_access_key_expiry); else wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_NET_ACCESS_KEY "%s", hex); os_free(hex); } } return wpas_dpp_process_config(wpa_s, auth, conf); } static void wpas_dpp_gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; const u8 *pos; struct dpp_authentication *auth = wpa_s->dpp_auth; int res; enum dpp_status_error status = DPP_STATUS_CONFIG_REJECTED; unsigned int i; wpa_s->dpp_gas_dialog_token = -1; if (!auth || !auth->auth_success) { wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress"); return; } if (result != GAS_QUERY_SUCCESS || !resp || status_code != WLAN_STATUS_SUCCESS) { wpa_printf(MSG_DEBUG, "DPP: GAS query did not succeed"); goto fail; } wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Response adv_proto", adv_proto); wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Response (GAS response)", resp); if (wpabuf_len(adv_proto) != 10 || !(pos = wpabuf_head(adv_proto)) || pos[0] != WLAN_EID_ADV_PROTO || pos[1] != 8 || pos[3] != WLAN_EID_VENDOR_SPECIFIC || pos[4] != 5 || WPA_GET_BE24(&pos[5]) != OUI_WFA || pos[8] != 0x1a || pos[9] != 1) { wpa_printf(MSG_DEBUG, "DPP: Not a DPP Advertisement Protocol ID"); goto fail; } if (dpp_conf_resp_rx(auth, resp) < 0) { wpa_printf(MSG_DEBUG, "DPP: Configuration attempt failed"); goto fail; } for (i = 0; i < auth->num_conf_obj; i++) { res = wpas_dpp_handle_config_obj(wpa_s, auth, &auth->conf_obj[i]); if (res < 0) goto fail; } if (auth->num_conf_obj) wpas_dpp_post_process_config(wpa_s, auth); status = DPP_STATUS_OK; #ifdef CONFIG_TESTING_OPTIONS if (dpp_test == DPP_TEST_REJECT_CONFIG) { wpa_printf(MSG_INFO, "DPP: TESTING - Reject Config Object"); status = DPP_STATUS_CONFIG_REJECTED; } #endif /* CONFIG_TESTING_OPTIONS */ fail: if (status != DPP_STATUS_OK) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); #ifdef CONFIG_DPP2 if (auth->peer_version >= 2 && auth->conf_resp_status == DPP_STATUS_OK) { struct wpabuf *msg; wpa_printf(MSG_DEBUG, "DPP: Send DPP Configuration Result"); msg = dpp_build_conf_result(auth, status); if (!msg) goto fail2; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(addr), auth->curr_freq, DPP_PA_CONFIGURATION_RESULT); offchannel_send_action(wpa_s, auth->curr_freq, addr, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), 500, wpas_dpp_tx_status, 0); wpabuf_free(msg); /* This exchange will be terminated in the TX status handler */ return; } fail2: #endif /* CONFIG_DPP2 */ dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; } static void wpas_dpp_start_gas_client(struct wpa_supplicant *wpa_s) { struct dpp_authentication *auth = wpa_s->dpp_auth; struct wpabuf *buf; int res; int *supp_op_classes; wpa_s->dpp_gas_client = 1; offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); supp_op_classes = wpas_supp_op_classes(wpa_s); buf = dpp_build_conf_req_helper(auth, wpa_s->conf->dpp_name, wpa_s->dpp_netrole, wpa_s->conf->dpp_mud_url, supp_op_classes); os_free(supp_op_classes); if (!buf) { wpa_printf(MSG_DEBUG, "DPP: No configuration request data available"); return; } wpa_printf(MSG_DEBUG, "DPP: GAS request to " MACSTR " (freq %u MHz)", MAC2STR(auth->peer_mac_addr), auth->curr_freq); res = gas_query_req(wpa_s->gas, auth->peer_mac_addr, auth->curr_freq, 1, buf, wpas_dpp_gas_resp_cb, wpa_s); if (res < 0) { wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request"); wpabuf_free(buf); } else { wpa_printf(MSG_DEBUG, "DPP: GAS query started with dialog token %u", res); wpa_s->dpp_gas_dialog_token = res; } } static void wpas_dpp_auth_success(struct wpa_supplicant *wpa_s, int initiator) { wpa_printf(MSG_DEBUG, "DPP: Authentication succeeded"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_AUTH_SUCCESS "init=%d", initiator); #ifdef CONFIG_TESTING_OPTIONS if (dpp_test == DPP_TEST_STOP_AT_AUTH_CONF) { wpa_printf(MSG_INFO, "DPP: TESTING - stop at Authentication Confirm"); if (wpa_s->dpp_auth->configurator) { /* Prevent GAS response */ wpa_s->dpp_auth->auth_success = 0; } return; } #endif /* CONFIG_TESTING_OPTIONS */ if (wpa_s->dpp_auth->configurator) wpas_dpp_start_gas_server(wpa_s); else wpas_dpp_start_gas_client(wpa_s); } static void wpas_dpp_rx_auth_resp(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len, unsigned int freq) { struct dpp_authentication *auth = wpa_s->dpp_auth; struct wpabuf *msg; wpa_printf(MSG_DEBUG, "DPP: Authentication Response from " MACSTR " (freq %u MHz)", MAC2STR(src), freq); if (!auth) { wpa_printf(MSG_DEBUG, "DPP: No DPP Authentication in progress - drop"); return; } if (!is_zero_ether_addr(auth->peer_mac_addr) && os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected " MACSTR ") - drop", MAC2STR(auth->peer_mac_addr)); return; } eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); if (auth->curr_freq != freq && auth->neg_freq == freq) { wpa_printf(MSG_DEBUG, "DPP: Responder accepted request for different negotiation channel"); auth->curr_freq = freq; } eloop_cancel_timeout(wpas_dpp_init_timeout, wpa_s, NULL); msg = dpp_auth_resp_rx(auth, hdr, buf, len); if (!msg) { if (auth->auth_resp_status == DPP_STATUS_RESPONSE_PENDING) { wpa_printf(MSG_DEBUG, "DPP: Start wait for full response"); offchannel_send_action_done(wpa_s); wpas_dpp_listen_start(wpa_s, auth->curr_freq); return; } wpa_printf(MSG_DEBUG, "DPP: No confirm generated"); return; } os_memcpy(auth->peer_mac_addr, src, ETH_ALEN); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(src), auth->curr_freq, DPP_PA_AUTHENTICATION_CONF); offchannel_send_action(wpa_s, auth->curr_freq, src, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), 500, wpas_dpp_tx_status, 0); wpabuf_free(msg); wpa_s->dpp_auth_ok_on_ack = 1; } static void wpas_dpp_rx_auth_conf(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len) { struct dpp_authentication *auth = wpa_s->dpp_auth; wpa_printf(MSG_DEBUG, "DPP: Authentication Confirmation from " MACSTR, MAC2STR(src)); if (!auth) { wpa_printf(MSG_DEBUG, "DPP: No DPP Authentication in progress - drop"); return; } if (os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected " MACSTR ") - drop", MAC2STR(auth->peer_mac_addr)); return; } if (dpp_auth_conf_rx(auth, hdr, buf, len) < 0) { wpa_printf(MSG_DEBUG, "DPP: Authentication failed"); return; } wpas_dpp_auth_success(wpa_s, 0); } #ifdef CONFIG_DPP2 static void wpas_dpp_config_result_wait_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; if (!auth || !auth->waiting_conf_result) return; wpa_printf(MSG_DEBUG, "DPP: Timeout while waiting for Configuration Result"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); dpp_auth_deinit(auth); wpa_s->dpp_auth = NULL; } static void wpas_dpp_conn_status_result_wait_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; if (!auth || !auth->waiting_conn_status_result) return; wpa_printf(MSG_DEBUG, "DPP: Timeout while waiting for Connection Status Result"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONN_STATUS_RESULT "timeout"); wpas_dpp_listen_stop(wpa_s); dpp_auth_deinit(auth); wpa_s->dpp_auth = NULL; } static void wpas_dpp_rx_conf_result(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len) { struct dpp_authentication *auth = wpa_s->dpp_auth; enum dpp_status_error status; wpa_printf(MSG_DEBUG, "DPP: Configuration Result from " MACSTR, MAC2STR(src)); if (!auth || !auth->waiting_conf_result) { wpa_printf(MSG_DEBUG, "DPP: No DPP Configuration waiting for result - drop"); return; } if (os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected " MACSTR ") - drop", MAC2STR(auth->peer_mac_addr)); return; } status = dpp_conf_result_rx(auth, hdr, buf, len); if (status == DPP_STATUS_OK && auth->send_conn_status) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_SENT "wait_conn_status=1"); wpa_printf(MSG_DEBUG, "DPP: Wait for Connection Status Result"); eloop_cancel_timeout(wpas_dpp_config_result_wait_timeout, wpa_s, NULL); auth->waiting_conn_status_result = 1; eloop_cancel_timeout(wpas_dpp_conn_status_result_wait_timeout, wpa_s, NULL); eloop_register_timeout(16, 0, wpas_dpp_conn_status_result_wait_timeout, wpa_s, NULL); offchannel_send_action_done(wpa_s); wpas_dpp_listen_start(wpa_s, auth->neg_freq ? auth->neg_freq : auth->curr_freq); return; } offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); if (status == DPP_STATUS_OK) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_SENT); else wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); dpp_auth_deinit(auth); wpa_s->dpp_auth = NULL; eloop_cancel_timeout(wpas_dpp_config_result_wait_timeout, wpa_s, NULL); } static void wpas_dpp_rx_conn_status_result(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len) { struct dpp_authentication *auth = wpa_s->dpp_auth; enum dpp_status_error status; u8 ssid[SSID_MAX_LEN]; size_t ssid_len = 0; char *channel_list = NULL; wpa_printf(MSG_DEBUG, "DPP: Connection Status Result"); if (!auth || !auth->waiting_conn_status_result) { wpa_printf(MSG_DEBUG, "DPP: No DPP Configuration waiting for connection status result - drop"); return; } status = dpp_conn_status_result_rx(auth, hdr, buf, len, ssid, &ssid_len, &channel_list); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONN_STATUS_RESULT "result=%d ssid=%s channel_list=%s", status, wpa_ssid_txt(ssid, ssid_len), channel_list ? channel_list : "N/A"); os_free(channel_list); offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); dpp_auth_deinit(auth); wpa_s->dpp_auth = NULL; eloop_cancel_timeout(wpas_dpp_conn_status_result_wait_timeout, wpa_s, NULL); } static int wpas_dpp_process_conf_obj(void *ctx, struct dpp_authentication *auth) { struct wpa_supplicant *wpa_s = ctx; unsigned int i; int res = -1; for (i = 0; i < auth->num_conf_obj; i++) { res = wpas_dpp_handle_config_obj(wpa_s, auth, &auth->conf_obj[i]); if (res) break; } if (!res) wpas_dpp_post_process_config(wpa_s, auth); return res; } #endif /* CONFIG_DPP2 */ static void wpas_dpp_rx_peer_disc_resp(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *buf, size_t len) { struct wpa_ssid *ssid; const u8 *connector, *trans_id, *status; u16 connector_len, trans_id_len, status_len; struct dpp_introduction intro; struct rsn_pmksa_cache_entry *entry; struct os_time now; struct os_reltime rnow; os_time_t expiry; unsigned int seconds; enum dpp_status_error res; wpa_printf(MSG_DEBUG, "DPP: Peer Discovery Response from " MACSTR, MAC2STR(src)); if (is_zero_ether_addr(wpa_s->dpp_intro_bssid) || os_memcmp(src, wpa_s->dpp_intro_bssid, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: Not waiting for response from " MACSTR " - drop", MAC2STR(src)); return; } offchannel_send_action_done(wpa_s); for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (ssid == wpa_s->dpp_intro_network) break; } if (!ssid || !ssid->dpp_connector || !ssid->dpp_netaccesskey || !ssid->dpp_csign) { wpa_printf(MSG_DEBUG, "DPP: Profile not found for network introduction"); return; } trans_id = dpp_get_attr(buf, len, DPP_ATTR_TRANSACTION_ID, &trans_id_len); if (!trans_id || trans_id_len != 1) { wpa_printf(MSG_DEBUG, "DPP: Peer did not include Transaction ID"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " fail=missing_transaction_id", MAC2STR(src)); goto fail; } if (trans_id[0] != TRANSACTION_ID) { wpa_printf(MSG_DEBUG, "DPP: Ignore frame with unexpected Transaction ID %u", trans_id[0]); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " fail=transaction_id_mismatch", MAC2STR(src)); goto fail; } status = dpp_get_attr(buf, len, DPP_ATTR_STATUS, &status_len); if (!status || status_len != 1) { wpa_printf(MSG_DEBUG, "DPP: Peer did not include Status"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " fail=missing_status", MAC2STR(src)); goto fail; } if (status[0] != DPP_STATUS_OK) { wpa_printf(MSG_DEBUG, "DPP: Peer rejected network introduction: Status %u", status[0]); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " status=%u", MAC2STR(src), status[0]); #ifdef CONFIG_DPP2 wpas_dpp_send_conn_status_result(wpa_s, status[0]); #endif /* CONFIG_DPP2 */ goto fail; } connector = dpp_get_attr(buf, len, DPP_ATTR_CONNECTOR, &connector_len); if (!connector) { wpa_printf(MSG_DEBUG, "DPP: Peer did not include its Connector"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " fail=missing_connector", MAC2STR(src)); goto fail; } res = dpp_peer_intro(&intro, ssid->dpp_connector, ssid->dpp_netaccesskey, ssid->dpp_netaccesskey_len, ssid->dpp_csign, ssid->dpp_csign_len, connector, connector_len, &expiry); if (res != DPP_STATUS_OK) { wpa_printf(MSG_INFO, "DPP: Network Introduction protocol resulted in failure"); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " fail=peer_connector_validation_failed", MAC2STR(src)); #ifdef CONFIG_DPP2 wpas_dpp_send_conn_status_result(wpa_s, res); #endif /* CONFIG_DPP2 */ goto fail; } entry = os_zalloc(sizeof(*entry)); if (!entry) goto fail; os_memcpy(entry->aa, src, ETH_ALEN); os_memcpy(entry->pmkid, intro.pmkid, PMKID_LEN); os_memcpy(entry->pmk, intro.pmk, intro.pmk_len); entry->pmk_len = intro.pmk_len; entry->akmp = WPA_KEY_MGMT_DPP; if (expiry) { os_get_time(&now); seconds = expiry - now.sec; } else { seconds = 86400 * 7; } os_get_reltime(&rnow); entry->expiration = rnow.sec + seconds; entry->reauth_time = rnow.sec + seconds; entry->network_ctx = ssid; wpa_sm_pmksa_cache_add_entry(wpa_s->wpa, entry); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_INTRO "peer=" MACSTR " status=%u", MAC2STR(src), status[0]); wpa_printf(MSG_DEBUG, "DPP: Try connection again after successful network introduction"); if (wpa_supplicant_fast_associate(wpa_s) != 1) { wpa_supplicant_cancel_sched_scan(wpa_s); wpa_supplicant_req_scan(wpa_s, 0, 0); } fail: os_memset(&intro, 0, sizeof(intro)); } static int wpas_dpp_allow_ir(struct wpa_supplicant *wpa_s, unsigned int freq) { int i, j; if (!wpa_s->hw.modes) return -1; for (i = 0; i < wpa_s->hw.num_modes; i++) { struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i]; for (j = 0; j < mode->num_channels; j++) { struct hostapd_channel_data *chan = &mode->channels[j]; if (chan->freq != (int) freq) continue; if (chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR | HOSTAPD_CHAN_RADAR)) continue; return 1; } } wpa_printf(MSG_DEBUG, "DPP: Frequency %u MHz not supported or does not allow PKEX initiation in the current channel list", freq); return 0; } static int wpas_dpp_pkex_next_channel(struct wpa_supplicant *wpa_s, struct dpp_pkex *pkex) { if (pkex->freq == 2437) pkex->freq = 5745; else if (pkex->freq == 5745) pkex->freq = 5220; else if (pkex->freq == 5220) pkex->freq = 60480; else return -1; /* no more channels to try */ if (wpas_dpp_allow_ir(wpa_s, pkex->freq) == 1) { wpa_printf(MSG_DEBUG, "DPP: Try to initiate on %u MHz", pkex->freq); return 0; } /* Could not use this channel - try the next one */ return wpas_dpp_pkex_next_channel(wpa_s, pkex); } static void wpas_dpp_pkex_retry_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct dpp_pkex *pkex = wpa_s->dpp_pkex; if (!pkex || !pkex->exchange_req) return; if (pkex->exch_req_tries >= 5) { if (wpas_dpp_pkex_next_channel(wpa_s, pkex) < 0) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_FAIL "No response from PKEX peer"); dpp_pkex_free(pkex); wpa_s->dpp_pkex = NULL; return; } pkex->exch_req_tries = 0; } pkex->exch_req_tries++; wpa_printf(MSG_DEBUG, "DPP: Retransmit PKEX Exchange Request (try %u)", pkex->exch_req_tries); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(broadcast), pkex->freq, DPP_PA_PKEX_EXCHANGE_REQ); offchannel_send_action(wpa_s, pkex->freq, broadcast, wpa_s->own_addr, broadcast, wpabuf_head(pkex->exchange_req), wpabuf_len(pkex->exchange_req), pkex->exch_req_wait_time, wpas_dpp_tx_pkex_status, 0); } static void wpas_dpp_tx_pkex_status(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *data, size_t data_len, enum offchannel_send_action_result result) { const char *res_txt; struct dpp_pkex *pkex = wpa_s->dpp_pkex; res_txt = result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" : (result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" : "FAILED"); wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR " result=%s (PKEX)", freq, MAC2STR(dst), res_txt); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX_STATUS "dst=" MACSTR " freq=%u result=%s", MAC2STR(dst), freq, res_txt); if (!pkex) { wpa_printf(MSG_DEBUG, "DPP: Ignore TX status since there is no ongoing PKEX exchange"); return; } if (pkex->failed) { wpa_printf(MSG_DEBUG, "DPP: Terminate PKEX exchange due to an earlier error"); if (pkex->t > pkex->own_bi->pkex_t) pkex->own_bi->pkex_t = pkex->t; dpp_pkex_free(pkex); wpa_s->dpp_pkex = NULL; return; } if (pkex->exch_req_wait_time && pkex->exchange_req) { /* Wait for PKEX Exchange Response frame and retry request if * no response is seen. */ eloop_cancel_timeout(wpas_dpp_pkex_retry_timeout, wpa_s, NULL); eloop_register_timeout(pkex->exch_req_wait_time / 1000, (pkex->exch_req_wait_time % 1000) * 1000, wpas_dpp_pkex_retry_timeout, wpa_s, NULL); } } static void wpas_dpp_rx_pkex_exchange_req(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *buf, size_t len, unsigned int freq) { struct wpabuf *msg; unsigned int wait_time; wpa_printf(MSG_DEBUG, "DPP: PKEX Exchange Request from " MACSTR, MAC2STR(src)); /* TODO: Support multiple PKEX codes by iterating over all the enabled * values here */ if (!wpa_s->dpp_pkex_code || !wpa_s->dpp_pkex_bi) { wpa_printf(MSG_DEBUG, "DPP: No PKEX code configured - ignore request"); return; } if (wpa_s->dpp_pkex) { /* TODO: Support parallel operations */ wpa_printf(MSG_DEBUG, "DPP: Already in PKEX session - ignore new request"); return; } wpa_s->dpp_pkex = dpp_pkex_rx_exchange_req(wpa_s, wpa_s->dpp_pkex_bi, wpa_s->own_addr, src, wpa_s->dpp_pkex_identifier, wpa_s->dpp_pkex_code, buf, len); if (!wpa_s->dpp_pkex) { wpa_printf(MSG_DEBUG, "DPP: Failed to process the request - ignore it"); return; } msg = wpa_s->dpp_pkex->exchange_resp; wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(src), freq, DPP_PA_PKEX_EXCHANGE_RESP); offchannel_send_action(wpa_s, freq, src, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_pkex_status, 0); } static void wpas_dpp_rx_pkex_exchange_resp(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *buf, size_t len, unsigned int freq) { struct wpabuf *msg; unsigned int wait_time; wpa_printf(MSG_DEBUG, "DPP: PKEX Exchange Response from " MACSTR, MAC2STR(src)); /* TODO: Support multiple PKEX codes by iterating over all the enabled * values here */ if (!wpa_s->dpp_pkex || !wpa_s->dpp_pkex->initiator || wpa_s->dpp_pkex->exchange_done) { wpa_printf(MSG_DEBUG, "DPP: No matching PKEX session"); return; } eloop_cancel_timeout(wpas_dpp_pkex_retry_timeout, wpa_s, NULL); wpa_s->dpp_pkex->exch_req_wait_time = 0; msg = dpp_pkex_rx_exchange_resp(wpa_s->dpp_pkex, src, buf, len); if (!msg) { wpa_printf(MSG_DEBUG, "DPP: Failed to process the response"); return; } wpa_printf(MSG_DEBUG, "DPP: Send PKEX Commit-Reveal Request to " MACSTR, MAC2STR(src)); wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(src), freq, DPP_PA_PKEX_COMMIT_REVEAL_REQ); offchannel_send_action(wpa_s, freq, src, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_pkex_status, 0); wpabuf_free(msg); } static struct dpp_bootstrap_info * wpas_dpp_pkex_finish(struct wpa_supplicant *wpa_s, const u8 *peer, unsigned int freq) { struct dpp_bootstrap_info *bi; bi = dpp_pkex_finish(wpa_s->dpp, wpa_s->dpp_pkex, peer, freq); if (!bi) return NULL; wpa_s->dpp_pkex = NULL; return bi; } static void wpas_dpp_rx_pkex_commit_reveal_req(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len, unsigned int freq) { struct wpabuf *msg; unsigned int wait_time; struct dpp_pkex *pkex = wpa_s->dpp_pkex; wpa_printf(MSG_DEBUG, "DPP: PKEX Commit-Reveal Request from " MACSTR, MAC2STR(src)); if (!pkex || pkex->initiator || !pkex->exchange_done) { wpa_printf(MSG_DEBUG, "DPP: No matching PKEX session"); return; } msg = dpp_pkex_rx_commit_reveal_req(pkex, hdr, buf, len); if (!msg) { wpa_printf(MSG_DEBUG, "DPP: Failed to process the request"); if (pkex->failed) { wpa_printf(MSG_DEBUG, "DPP: Terminate PKEX exchange"); if (pkex->t > pkex->own_bi->pkex_t) pkex->own_bi->pkex_t = pkex->t; dpp_pkex_free(wpa_s->dpp_pkex); wpa_s->dpp_pkex = NULL; } return; } wpa_printf(MSG_DEBUG, "DPP: Send PKEX Commit-Reveal Response to " MACSTR, MAC2STR(src)); wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(src), freq, DPP_PA_PKEX_COMMIT_REVEAL_RESP); offchannel_send_action(wpa_s, freq, src, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_pkex_status, 0); wpabuf_free(msg); wpas_dpp_pkex_finish(wpa_s, src, freq); } static void wpas_dpp_rx_pkex_commit_reveal_resp(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *hdr, const u8 *buf, size_t len, unsigned int freq) { int res; struct dpp_bootstrap_info *bi; struct dpp_pkex *pkex = wpa_s->dpp_pkex; char cmd[500]; wpa_printf(MSG_DEBUG, "DPP: PKEX Commit-Reveal Response from " MACSTR, MAC2STR(src)); if (!pkex || !pkex->initiator || !pkex->exchange_done) { wpa_printf(MSG_DEBUG, "DPP: No matching PKEX session"); return; } res = dpp_pkex_rx_commit_reveal_resp(pkex, hdr, buf, len); if (res < 0) { wpa_printf(MSG_DEBUG, "DPP: Failed to process the response"); return; } bi = wpas_dpp_pkex_finish(wpa_s, src, freq); if (!bi) return; os_snprintf(cmd, sizeof(cmd), " peer=%u %s", bi->id, wpa_s->dpp_pkex_auth_cmd ? wpa_s->dpp_pkex_auth_cmd : ""); wpa_printf(MSG_DEBUG, "DPP: Start authentication after PKEX with parameters: %s", cmd); if (wpas_dpp_auth_init(wpa_s, cmd) < 0) { wpa_printf(MSG_DEBUG, "DPP: Authentication initialization failed"); return; } } void wpas_dpp_rx_action(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *buf, size_t len, unsigned int freq) { u8 crypto_suite; enum dpp_public_action_frame_type type; const u8 *hdr; unsigned int pkex_t; if (len < DPP_HDR_LEN) return; if (WPA_GET_BE24(buf) != OUI_WFA || buf[3] != DPP_OUI_TYPE) return; hdr = buf; buf += 4; len -= 4; crypto_suite = *buf++; type = *buf++; len -= 2; wpa_printf(MSG_DEBUG, "DPP: Received DPP Public Action frame crypto suite %u type %d from " MACSTR " freq=%u", crypto_suite, type, MAC2STR(src), freq); if (crypto_suite != 1) { wpa_printf(MSG_DEBUG, "DPP: Unsupported crypto suite %u", crypto_suite); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_RX "src=" MACSTR " freq=%u type=%d ignore=unsupported-crypto-suite", MAC2STR(src), freq, type); return; } wpa_hexdump(MSG_MSGDUMP, "DPP: Received message attributes", buf, len); if (dpp_check_attrs(buf, len) < 0) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_RX "src=" MACSTR " freq=%u type=%d ignore=invalid-attributes", MAC2STR(src), freq, type); return; } wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_RX "src=" MACSTR " freq=%u type=%d", MAC2STR(src), freq, type); switch (type) { case DPP_PA_AUTHENTICATION_REQ: wpas_dpp_rx_auth_req(wpa_s, src, hdr, buf, len, freq); break; case DPP_PA_AUTHENTICATION_RESP: wpas_dpp_rx_auth_resp(wpa_s, src, hdr, buf, len, freq); break; case DPP_PA_AUTHENTICATION_CONF: wpas_dpp_rx_auth_conf(wpa_s, src, hdr, buf, len); break; case DPP_PA_PEER_DISCOVERY_RESP: wpas_dpp_rx_peer_disc_resp(wpa_s, src, buf, len); break; case DPP_PA_PKEX_EXCHANGE_REQ: wpas_dpp_rx_pkex_exchange_req(wpa_s, src, buf, len, freq); break; case DPP_PA_PKEX_EXCHANGE_RESP: wpas_dpp_rx_pkex_exchange_resp(wpa_s, src, buf, len, freq); break; case DPP_PA_PKEX_COMMIT_REVEAL_REQ: wpas_dpp_rx_pkex_commit_reveal_req(wpa_s, src, hdr, buf, len, freq); break; case DPP_PA_PKEX_COMMIT_REVEAL_RESP: wpas_dpp_rx_pkex_commit_reveal_resp(wpa_s, src, hdr, buf, len, freq); break; #ifdef CONFIG_DPP2 case DPP_PA_CONFIGURATION_RESULT: wpas_dpp_rx_conf_result(wpa_s, src, hdr, buf, len); break; case DPP_PA_CONNECTION_STATUS_RESULT: wpas_dpp_rx_conn_status_result(wpa_s, src, hdr, buf, len); break; #endif /* CONFIG_DPP2 */ default: wpa_printf(MSG_DEBUG, "DPP: Ignored unsupported frame subtype %d", type); break; } if (wpa_s->dpp_pkex) pkex_t = wpa_s->dpp_pkex->t; else if (wpa_s->dpp_pkex_bi) pkex_t = wpa_s->dpp_pkex_bi->pkex_t; else pkex_t = 0; if (pkex_t >= PKEX_COUNTER_T_LIMIT) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_PKEX_T_LIMIT "id=0"); wpas_dpp_pkex_remove(wpa_s, "*"); } } static struct wpabuf * wpas_dpp_gas_req_handler(void *ctx, const u8 *sa, const u8 *query, size_t query_len) { struct wpa_supplicant *wpa_s = ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; struct wpabuf *resp; wpa_printf(MSG_DEBUG, "DPP: GAS request from " MACSTR, MAC2STR(sa)); if (!auth || !auth->auth_success || os_memcmp(sa, auth->peer_mac_addr, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress"); return NULL; } if (wpa_s->dpp_auth_ok_on_ack && auth->configurator) { wpa_printf(MSG_DEBUG, "DPP: Have not received ACK for Auth Confirm yet - assume it was received based on this GAS request"); /* wpas_dpp_auth_success() would normally have been called from * TX status handler, but since there was no such handler call * yet, simply send out the event message and proceed with * exchange. */ wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_AUTH_SUCCESS "init=1"); wpa_s->dpp_auth_ok_on_ack = 0; } wpa_hexdump(MSG_DEBUG, "DPP: Received Configuration Request (GAS Query Request)", query, query_len); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_REQ_RX "src=" MACSTR, MAC2STR(sa)); resp = dpp_conf_req_rx(auth, query, query_len); if (!resp) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); auth->conf_resp = resp; return resp; } static void wpas_dpp_gas_status_handler(void *ctx, struct wpabuf *resp, int ok) { struct wpa_supplicant *wpa_s = ctx; struct dpp_authentication *auth = wpa_s->dpp_auth; if (!auth) { wpabuf_free(resp); return; } if (auth->conf_resp != resp) { wpa_printf(MSG_DEBUG, "DPP: Ignore GAS status report (ok=%d) for unknown response", ok); wpabuf_free(resp); return; } wpa_printf(MSG_DEBUG, "DPP: Configuration exchange completed (ok=%d)", ok); eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_auth_resp_retry_timeout, wpa_s, NULL); #ifdef CONFIG_DPP2 if (ok && auth->peer_version >= 2 && auth->conf_resp_status == DPP_STATUS_OK) { wpa_printf(MSG_DEBUG, "DPP: Wait for Configuration Result"); auth->waiting_conf_result = 1; auth->conf_resp = NULL; wpabuf_free(resp); eloop_cancel_timeout(wpas_dpp_config_result_wait_timeout, wpa_s, NULL); eloop_register_timeout(2, 0, wpas_dpp_config_result_wait_timeout, wpa_s, NULL); return; } #endif /* CONFIG_DPP2 */ offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); if (ok) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_SENT); else wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; wpabuf_free(resp); } int wpas_dpp_configurator_sign(struct wpa_supplicant *wpa_s, const char *cmd) { struct dpp_authentication *auth; int ret = -1; char *curve = NULL; auth = os_zalloc(sizeof(*auth)); if (!auth) return -1; curve = get_param(cmd, " curve="); wpas_dpp_set_testing_options(wpa_s, auth); if (dpp_set_configurator(wpa_s->dpp, wpa_s, auth, cmd) == 0 && dpp_configurator_own_config(auth, curve, 0) == 0) ret = wpas_dpp_handle_config_obj(wpa_s, auth, &auth->conf_obj[0]); if (!ret) wpas_dpp_post_process_config(wpa_s, auth); dpp_auth_deinit(auth); os_free(curve); return ret; } static void wpas_dpp_tx_introduction_status(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *data, size_t data_len, enum offchannel_send_action_result result) { const char *res_txt; res_txt = result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" : (result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" : "FAILED"); wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR " result=%s (DPP Peer Discovery Request)", freq, MAC2STR(dst), res_txt); wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX_STATUS "dst=" MACSTR " freq=%u result=%s", MAC2STR(dst), freq, res_txt); /* TODO: Time out wait for response more quickly in error cases? */ } int wpas_dpp_check_connect(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, struct wpa_bss *bss) { struct os_time now; struct wpabuf *msg; unsigned int wait_time; const u8 *rsn; struct wpa_ie_data ied; if (!(ssid->key_mgmt & WPA_KEY_MGMT_DPP) || !bss) return 0; /* Not using DPP AKM - continue */ rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 && !(ied.key_mgmt & WPA_KEY_MGMT_DPP)) return 0; /* AP does not support DPP AKM - continue */ if (wpa_sm_pmksa_exists(wpa_s->wpa, bss->bssid, ssid)) return 0; /* PMKSA exists for DPP AKM - continue */ if (!ssid->dpp_connector || !ssid->dpp_netaccesskey || !ssid->dpp_csign) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_MISSING_CONNECTOR "missing %s", !ssid->dpp_connector ? "Connector" : (!ssid->dpp_netaccesskey ? "netAccessKey" : "C-sign-key")); return -1; } os_get_time(&now); if (ssid->dpp_netaccesskey_expiry && (os_time_t) ssid->dpp_netaccesskey_expiry < now.sec) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_MISSING_CONNECTOR "netAccessKey expired"); return -1; } wpa_printf(MSG_DEBUG, "DPP: Starting network introduction protocol to derive PMKSA for " MACSTR, MAC2STR(bss->bssid)); msg = dpp_alloc_msg(DPP_PA_PEER_DISCOVERY_REQ, 5 + 4 + os_strlen(ssid->dpp_connector)); if (!msg) return -1; #ifdef CONFIG_TESTING_OPTIONS if (dpp_test == DPP_TEST_NO_TRANSACTION_ID_PEER_DISC_REQ) { wpa_printf(MSG_INFO, "DPP: TESTING - no Transaction ID"); goto skip_trans_id; } if (dpp_test == DPP_TEST_INVALID_TRANSACTION_ID_PEER_DISC_REQ) { wpa_printf(MSG_INFO, "DPP: TESTING - invalid Transaction ID"); wpabuf_put_le16(msg, DPP_ATTR_TRANSACTION_ID); wpabuf_put_le16(msg, 0); goto skip_trans_id; } #endif /* CONFIG_TESTING_OPTIONS */ /* Transaction ID */ wpabuf_put_le16(msg, DPP_ATTR_TRANSACTION_ID); wpabuf_put_le16(msg, 1); wpabuf_put_u8(msg, TRANSACTION_ID); #ifdef CONFIG_TESTING_OPTIONS skip_trans_id: if (dpp_test == DPP_TEST_NO_CONNECTOR_PEER_DISC_REQ) { wpa_printf(MSG_INFO, "DPP: TESTING - no Connector"); goto skip_connector; } if (dpp_test == DPP_TEST_INVALID_CONNECTOR_PEER_DISC_REQ) { char *connector; wpa_printf(MSG_INFO, "DPP: TESTING - invalid Connector"); connector = dpp_corrupt_connector_signature( ssid->dpp_connector); if (!connector) { wpabuf_free(msg); return -1; } wpabuf_put_le16(msg, DPP_ATTR_CONNECTOR); wpabuf_put_le16(msg, os_strlen(connector)); wpabuf_put_str(msg, connector); os_free(connector); goto skip_connector; } #endif /* CONFIG_TESTING_OPTIONS */ /* DPP Connector */ wpabuf_put_le16(msg, DPP_ATTR_CONNECTOR); wpabuf_put_le16(msg, os_strlen(ssid->dpp_connector)); wpabuf_put_str(msg, ssid->dpp_connector); #ifdef CONFIG_TESTING_OPTIONS skip_connector: #endif /* CONFIG_TESTING_OPTIONS */ /* TODO: Timeout on AP response */ wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(bss->bssid), bss->freq, DPP_PA_PEER_DISCOVERY_REQ); offchannel_send_action(wpa_s, bss->freq, bss->bssid, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_introduction_status, 0); wpabuf_free(msg); /* Request this connection attempt to terminate - new one will be * started when network introduction protocol completes */ os_memcpy(wpa_s->dpp_intro_bssid, bss->bssid, ETH_ALEN); wpa_s->dpp_intro_network = ssid; return 1; } int wpas_dpp_pkex_add(struct wpa_supplicant *wpa_s, const char *cmd) { struct dpp_bootstrap_info *own_bi; const char *pos, *end; unsigned int wait_time; pos = os_strstr(cmd, " own="); if (!pos) return -1; pos += 5; own_bi = dpp_bootstrap_get_id(wpa_s->dpp, atoi(pos)); if (!own_bi) { wpa_printf(MSG_DEBUG, "DPP: Identified bootstrap info not found"); return -1; } if (own_bi->type != DPP_BOOTSTRAP_PKEX) { wpa_printf(MSG_DEBUG, "DPP: Identified bootstrap info not for PKEX"); return -1; } wpa_s->dpp_pkex_bi = own_bi; own_bi->pkex_t = 0; /* clear pending errors on new code */ os_free(wpa_s->dpp_pkex_identifier); wpa_s->dpp_pkex_identifier = NULL; pos = os_strstr(cmd, " identifier="); if (pos) { pos += 12; end = os_strchr(pos, ' '); if (!end) return -1; wpa_s->dpp_pkex_identifier = os_malloc(end - pos + 1); if (!wpa_s->dpp_pkex_identifier) return -1; os_memcpy(wpa_s->dpp_pkex_identifier, pos, end - pos); wpa_s->dpp_pkex_identifier[end - pos] = '\0'; } pos = os_strstr(cmd, " code="); if (!pos) return -1; os_free(wpa_s->dpp_pkex_code); wpa_s->dpp_pkex_code = os_strdup(pos + 6); if (!wpa_s->dpp_pkex_code) return -1; if (os_strstr(cmd, " init=1")) { struct dpp_pkex *pkex; struct wpabuf *msg; wpa_printf(MSG_DEBUG, "DPP: Initiating PKEX"); dpp_pkex_free(wpa_s->dpp_pkex); wpa_s->dpp_pkex = dpp_pkex_init(wpa_s, own_bi, wpa_s->own_addr, wpa_s->dpp_pkex_identifier, wpa_s->dpp_pkex_code); pkex = wpa_s->dpp_pkex; if (!pkex) return -1; msg = pkex->exchange_req; wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; pkex->freq = 2437; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR " freq=%u type=%d", MAC2STR(broadcast), pkex->freq, DPP_PA_PKEX_EXCHANGE_REQ); offchannel_send_action(wpa_s, pkex->freq, broadcast, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_pkex_status, 0); if (wait_time == 0) wait_time = 2000; pkex->exch_req_wait_time = wait_time; pkex->exch_req_tries = 1; } /* TODO: Support multiple PKEX info entries */ os_free(wpa_s->dpp_pkex_auth_cmd); wpa_s->dpp_pkex_auth_cmd = os_strdup(cmd); return 1; } int wpas_dpp_pkex_remove(struct wpa_supplicant *wpa_s, const char *id) { unsigned int id_val; if (os_strcmp(id, "*") == 0) { id_val = 0; } else { id_val = atoi(id); if (id_val == 0) return -1; } if ((id_val != 0 && id_val != 1) || !wpa_s->dpp_pkex_code) return -1; /* TODO: Support multiple PKEX entries */ os_free(wpa_s->dpp_pkex_code); wpa_s->dpp_pkex_code = NULL; os_free(wpa_s->dpp_pkex_identifier); wpa_s->dpp_pkex_identifier = NULL; os_free(wpa_s->dpp_pkex_auth_cmd); wpa_s->dpp_pkex_auth_cmd = NULL; wpa_s->dpp_pkex_bi = NULL; /* TODO: Remove dpp_pkex only if it is for the identified PKEX code */ dpp_pkex_free(wpa_s->dpp_pkex); wpa_s->dpp_pkex = NULL; return 0; } void wpas_dpp_stop(struct wpa_supplicant *wpa_s) { dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; dpp_pkex_free(wpa_s->dpp_pkex); wpa_s->dpp_pkex = NULL; if (wpa_s->dpp_gas_client && wpa_s->dpp_gas_dialog_token >= 0) gas_query_stop(wpa_s->gas, wpa_s->dpp_gas_dialog_token); } int wpas_dpp_init(struct wpa_supplicant *wpa_s) { struct dpp_global_config config; u8 adv_proto_id[7]; adv_proto_id[0] = WLAN_EID_VENDOR_SPECIFIC; adv_proto_id[1] = 5; WPA_PUT_BE24(&adv_proto_id[2], OUI_WFA); adv_proto_id[5] = DPP_OUI_TYPE; adv_proto_id[6] = 0x01; if (gas_server_register(wpa_s->gas_server, adv_proto_id, sizeof(adv_proto_id), wpas_dpp_gas_req_handler, wpas_dpp_gas_status_handler, wpa_s) < 0) return -1; os_memset(&config, 0, sizeof(config)); config.msg_ctx = wpa_s; config.cb_ctx = wpa_s; #ifdef CONFIG_DPP2 config.process_conf_obj = wpas_dpp_process_conf_obj; #endif /* CONFIG_DPP2 */ wpa_s->dpp = dpp_global_init(&config); return wpa_s->dpp ? 0 : -1; } void wpas_dpp_deinit(struct wpa_supplicant *wpa_s) { #ifdef CONFIG_TESTING_OPTIONS os_free(wpa_s->dpp_config_obj_override); wpa_s->dpp_config_obj_override = NULL; os_free(wpa_s->dpp_discovery_override); wpa_s->dpp_discovery_override = NULL; os_free(wpa_s->dpp_groups_override); wpa_s->dpp_groups_override = NULL; wpa_s->dpp_ignore_netaccesskey_mismatch = 0; #endif /* CONFIG_TESTING_OPTIONS */ if (!wpa_s->dpp) return; dpp_global_clear(wpa_s->dpp); eloop_cancel_timeout(wpas_dpp_pkex_retry_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_init_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_auth_resp_retry_timeout, wpa_s, NULL); #ifdef CONFIG_DPP2 eloop_cancel_timeout(wpas_dpp_config_result_wait_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_conn_status_result_wait_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_dpp_conn_status_result_timeout, wpa_s, NULL); dpp_pfs_free(wpa_s->dpp_pfs); wpa_s->dpp_pfs = NULL; #endif /* CONFIG_DPP2 */ offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); wpas_dpp_stop(wpa_s); wpas_dpp_pkex_remove(wpa_s, "*"); os_memset(wpa_s->dpp_intro_bssid, 0, ETH_ALEN); os_free(wpa_s->dpp_configurator_params); wpa_s->dpp_configurator_params = NULL; } #ifdef CONFIG_DPP2 int wpas_dpp_controller_start(struct wpa_supplicant *wpa_s, const char *cmd) { struct dpp_controller_config config; const char *pos; os_memset(&config, 0, sizeof(config)); if (cmd) { pos = os_strstr(cmd, " tcp_port="); if (pos) { pos += 10; config.tcp_port = atoi(pos); } } config.configurator_params = wpa_s->dpp_configurator_params; return dpp_controller_start(wpa_s->dpp, &config); } #endif /* CONFIG_DPP2 */