/* * wpa_supplicant - DPP * Copyright (c) 2017, Qualcomm Atheros, Inc. * * 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 "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 const u8 broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; static struct dpp_configurator * dpp_configurator_get_id(struct wpa_supplicant *wpa_s, unsigned int id) { struct dpp_configurator *conf; dl_list_for_each(conf, &wpa_s->dpp_configurator, struct dpp_configurator, list) { if (conf->id == id) return conf; } return NULL; } static unsigned int wpas_dpp_next_id(struct wpa_supplicant *wpa_s) { struct dpp_bootstrap_info *bi; unsigned int max_id = 0; dl_list_for_each(bi, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info, list) { if (bi->id > max_id) max_id = bi->id; } return max_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_parse_qr_code(cmd); if (!bi) return -1; bi->id = wpas_dpp_next_id(wpa_s); dl_list_add(&wpa_s->dpp_bootstrap, &bi->list); if (auth && auth->response_pending && dpp_notify_new_qr_code(auth, bi) == 1) { struct wpabuf *msg; wpa_printf(MSG_DEBUG, "DPP: Sending out pending authentication response"); msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_RESP, wpabuf_len(auth->resp_attr)); if (!msg) goto out; wpabuf_put_buf(msg, wpa_s->dpp_auth->resp_attr); 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); } out: return bi->id; } static char * get_param(const char *cmd, const char *param) { const char *pos, *end; char *val; size_t len; pos = os_strstr(cmd, param); if (!pos) return NULL; pos += os_strlen(param); end = os_strchr(pos, ' '); if (end) len = end - pos; else len = os_strlen(pos); val = os_malloc(len + 1); if (!val) return NULL; os_memcpy(val, pos, len); val[len] = '\0'; return val; } int wpas_dpp_bootstrap_gen(struct wpa_supplicant *wpa_s, const char *cmd) { char *chan = NULL, *mac = NULL, *info = NULL, *pk = NULL, *curve = NULL; char *key = NULL; u8 *privkey = NULL; size_t privkey_len = 0; size_t len; int ret = -1; struct dpp_bootstrap_info *bi; bi = os_zalloc(sizeof(*bi)); if (!bi) goto fail; if (os_strstr(cmd, "type=qrcode")) bi->type = DPP_BOOTSTRAP_QR_CODE; else if (os_strstr(cmd, "type=pkex")) bi->type = DPP_BOOTSTRAP_PKEX; else goto fail; chan = get_param(cmd, " chan="); mac = get_param(cmd, " mac="); info = get_param(cmd, " info="); curve = get_param(cmd, " curve="); key = get_param(cmd, " key="); if (key) { privkey_len = os_strlen(key) / 2; privkey = os_malloc(privkey_len); if (!privkey || hexstr2bin(key, privkey, privkey_len) < 0) goto fail; } pk = dpp_keygen(bi, curve, privkey, privkey_len); if (!pk) goto fail; len = 4; /* "DPP:" */ if (chan) { if (dpp_parse_uri_chan_list(bi, chan) < 0) goto fail; len += 3 + os_strlen(chan); /* C:...; */ } if (mac) { if (dpp_parse_uri_mac(bi, mac) < 0) goto fail; len += 3 + os_strlen(mac); /* M:...; */ } if (info) { if (dpp_parse_uri_info(bi, info) < 0) goto fail; len += 3 + os_strlen(info); /* I:...; */ } len += 4 + os_strlen(pk); bi->uri = os_malloc(len + 1); if (!bi->uri) goto fail; os_snprintf(bi->uri, len + 1, "DPP:%s%s%s%s%s%s%s%s%sK:%s;;", chan ? "C:" : "", chan ? chan : "", chan ? ";" : "", mac ? "M:" : "", mac ? mac : "", mac ? ";" : "", info ? "I:" : "", info ? info : "", info ? ";" : "", pk); bi->id = wpas_dpp_next_id(wpa_s); dl_list_add(&wpa_s->dpp_bootstrap, &bi->list); ret = bi->id; bi = NULL; fail: os_free(curve); os_free(pk); os_free(chan); os_free(mac); os_free(info); str_clear_free(key); bin_clear_free(privkey, privkey_len); dpp_bootstrap_info_free(bi); return ret; } static struct dpp_bootstrap_info * dpp_bootstrap_get_id(struct wpa_supplicant *wpa_s, unsigned int id) { struct dpp_bootstrap_info *bi; dl_list_for_each(bi, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info, list) { if (bi->id == id) return bi; } return NULL; } static int dpp_bootstrap_del(struct wpa_supplicant *wpa_s, unsigned int id) { struct dpp_bootstrap_info *bi, *tmp; int found = 0; dl_list_for_each_safe(bi, tmp, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info, list) { if (id && bi->id != id) continue; found = 1; dl_list_del(&bi->list); dpp_bootstrap_info_free(bi); } if (id == 0) return 0; /* flush succeeds regardless of entries found */ return found ? 0 : -1; } int wpas_dpp_bootstrap_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; } return dpp_bootstrap_del(wpa_s, id_val); } const char * wpas_dpp_bootstrap_get_uri(struct wpa_supplicant *wpa_s, unsigned int id) { struct dpp_bootstrap_info *bi; bi = dpp_bootstrap_get_id(wpa_s, id); if (!bi) return NULL; return bi->uri; } static const char * wpas_dpp_bootstrap_type(enum dpp_bootstrap_type type) { switch (type) { case DPP_BOOTSTRAP_QR_CODE: return "QRCODE"; case DPP_BOOTSTRAP_PKEX: return "PKEX"; } return "??"; } int wpas_dpp_bootstrap_info(struct wpa_supplicant *wpa_s, int id, char *reply, int reply_size) { struct dpp_bootstrap_info *bi; bi = dpp_bootstrap_get_id(wpa_s, id); if (!bi) return -1; return os_snprintf(reply, reply_size, "type=%s\n" "mac_addr=" MACSTR "\n" "info=%s\n" "num_freq=%u\n" "curve=%s\n", wpas_dpp_bootstrap_type(bi->type), MAC2STR(bi->mac_addr), bi->info ? bi->info : "", bi->num_freq, bi->curve->name); } 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) { wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR " result=%s", freq, MAC2STR(dst), result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" : (result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" : "FAILED")); if (!wpa_s->dpp_auth) { wpa_printf(MSG_DEBUG, "DPP: Ignore TX status since there is no ongoing authentication exchange"); return; } if (wpa_s->dpp_auth->remove_on_tx_status) { wpa_printf(MSG_DEBUG, "DPP: Terminate authentication exchange due to an earlier error"); 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; } 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"); /* TODO: In case of DPP Authentication Request frame, move to * the next channel immediately */ } } static void wpas_dpp_reply_wait_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: Continue reply wait on channel %u MHz", wpa_s->dpp_auth->curr_freq); wpas_dpp_listen_start(wpa_s, wpa_s->dpp_auth->curr_freq); } 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); if (wpa_s->dpp_devices_override) auth->devices_override = os_strdup(wpa_s->dpp_devices_override); auth->ignore_netaccesskey_mismatch = wpa_s->dpp_ignore_netaccesskey_mismatch; #endif /* CONFIG_TESTING_OPTIONS */ } static void wpas_dpp_set_configurator(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth, const char *cmd) { const char *pos, *end; struct dpp_configuration *conf_sta = NULL, *conf_ap = NULL; struct dpp_configurator *conf = NULL; u8 ssid[32] = { "test" }; size_t ssid_len = 4; char pass[64] = { }; size_t pass_len = 0; if (!cmd) return; wpa_printf(MSG_DEBUG, "DPP: Set configurator parameters: %s", cmd); pos = os_strstr(cmd, " ssid="); if (pos) { pos += 6; end = os_strchr(pos, ' '); ssid_len = end ? (size_t) (end - pos) : os_strlen(pos); ssid_len /= 2; if (ssid_len > sizeof(ssid) || hexstr2bin(pos, ssid, ssid_len) < 0) goto fail; } pos = os_strstr(cmd, " pass="); if (pos) { pos += 6; end = os_strchr(pos, ' '); pass_len = end ? (size_t) (end - pos) : os_strlen(pos); pass_len /= 2; if (pass_len > sizeof(pass) - 1 || pass_len < 8 || hexstr2bin(pos, (u8 *) pass, pass_len) < 0) goto fail; } if (os_strstr(cmd, " conf=sta-")) { conf_sta = os_zalloc(sizeof(struct dpp_configuration)); if (!conf_sta) goto fail; os_memcpy(conf_sta->ssid, ssid, ssid_len); conf_sta->ssid_len = ssid_len; if (os_strstr(cmd, " conf=sta-psk")) { conf_sta->dpp = 0; conf_sta->passphrase = os_strdup(pass); if (!conf_sta->passphrase) goto fail; } else if (os_strstr(cmd, " conf=sta-dpp")) { conf_sta->dpp = 1; } else { goto fail; } } if (os_strstr(cmd, " conf=ap-")) { conf_ap = os_zalloc(sizeof(struct dpp_configuration)); if (!conf_ap) goto fail; os_memcpy(conf_ap->ssid, ssid, ssid_len); conf_ap->ssid_len = ssid_len; if (os_strstr(cmd, " conf=ap-psk")) { conf_ap->dpp = 0; conf_ap->passphrase = os_strdup(pass); if (!conf_ap->passphrase) goto fail; } else if (os_strstr(cmd, " conf=ap-dpp")) { conf_ap->dpp = 1; } else { goto fail; } } pos = os_strstr(cmd, " expiry="); if (pos) { long int val; pos += 8; val = strtol(pos, NULL, 0); if (val <= 0) goto fail; if (conf_sta) conf_sta->netaccesskey_expiry = val; if (conf_ap) conf_ap->netaccesskey_expiry = val; } pos = os_strstr(cmd, " configurator="); if (pos) { pos += 14; conf = dpp_configurator_get_id(wpa_s, atoi(pos)); if (!conf) { wpa_printf(MSG_INFO, "DPP: Could not find the specified configurator"); goto fail; } } auth->conf_sta = conf_sta; auth->conf_ap = conf_ap; auth->conf = conf; return; fail: wpa_printf(MSG_DEBUG, "DPP: Failed to set configurator parameters"); dpp_configuration_free(conf_sta); dpp_configuration_free(conf_ap); } 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 wpabuf *msg; const u8 *dst; int res; int configurator = 1; unsigned int wait_time; 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, atoi(pos)); if (!peer_bi) { wpa_printf(MSG_INFO, "DPP: Could not find bootstrapping info for the identified peer"); return -1; } pos = os_strstr(cmd, " own="); if (pos) { pos += 5; own_bi = dpp_bootstrap_get_id(wpa_s, 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) configurator = 1; else if (os_strncmp(pos, "enrollee", 8) == 0) configurator = 0; else goto fail; } pos = os_strstr(cmd, " netrole="); if (pos) { pos += 9; wpa_s->dpp_netrole_ap = os_strncmp(pos, "ap", 2) == 0; } if (wpa_s->dpp_auth) { 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 = dpp_auth_init(wpa_s, peer_bi, own_bi, configurator); if (!wpa_s->dpp_auth) goto fail; wpas_dpp_set_testing_options(wpa_s, wpa_s->dpp_auth); wpas_dpp_set_configurator(wpa_s, wpa_s->dpp_auth, cmd); /* TODO: Support iteration over all frequencies and filtering of * frequencies based on locally enabled channels that allow initiation * of transmission. */ if (peer_bi->num_freq > 0) wpa_s->dpp_auth->curr_freq = peer_bi->freq[0]; else wpa_s->dpp_auth->curr_freq = 2412; msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_REQ, wpabuf_len(wpa_s->dpp_auth->req_attr)); if (!msg) return -1; wpabuf_put_buf(msg, wpa_s->dpp_auth->req_attr); if (is_zero_ether_addr(peer_bi->mac_addr)) { dst = broadcast; } else { dst = peer_bi->mac_addr; os_memcpy(wpa_s->dpp_auth->peer_mac_addr, peer_bi->mac_addr, ETH_ALEN); } 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; if (wait_time > 2000) wait_time = 2000; eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000, wpas_dpp_reply_wait_timeout, wpa_s, NULL); res = offchannel_send_action(wpa_s, wpa_s->dpp_auth->curr_freq, dst, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_status, 0); wpabuf_free(msg); return res; 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); 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; wpa_s->dpp_netrole_ap = os_strstr(cmd, " netrole=ap") != NULL; 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) { 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_remain_on_channel_cb(struct wpa_supplicant *wpa_s, unsigned int freq) { if (!wpa_s->dpp_listen_freq && !wpa_s->dpp_pending_listen_freq) return; wpa_printf(MSG_DEBUG, "DPP: remain-on-channel callback (off_channel_freq=%u dpp_pending_listen_freq=%d roc_waiting_drv_freq=%d freq=%u)", wpa_s->off_channel_freq, wpa_s->dpp_pending_listen_freq, wpa_s->roc_waiting_drv_freq, freq); if (wpa_s->off_channel_freq && wpa_s->off_channel_freq == wpa_s->dpp_pending_listen_freq) { wpa_printf(MSG_DEBUG, "DPP: Listen on %u MHz started", freq); wpa_s->dpp_pending_listen_freq = 0; } else { wpa_printf(MSG_DEBUG, "DPP: Ignore remain-on-channel callback (off_channel_freq=%u dpp_pending_listen_freq=%d freq=%u)", wpa_s->off_channel_freq, wpa_s->dpp_pending_listen_freq, freq); } } 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_gas_client) { /* Continue listen with a new remain-on-channel */ wpa_printf(MSG_DEBUG, "DPP: Continue wait on %u MHz for the ongoing DPP provisioning session", wpa_s->dpp_auth->curr_freq); wpas_dpp_listen_start(wpa_s, wpa_s->dpp_auth->curr_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 *buf, size_t len, unsigned int freq) { const u8 *r_bootstrap, *i_bootstrap, *wrapped_data; u16 r_bootstrap_len, i_bootstrap_len, wrapped_data_len; struct dpp_bootstrap_info *bi, *own_bi = NULL, *peer_bi = NULL; struct wpabuf *msg; wpa_printf(MSG_DEBUG, "DPP: Authentication Request from " MACSTR, MAC2STR(src)); wrapped_data = dpp_get_attr(buf, len, DPP_ATTR_WRAPPED_DATA, &wrapped_data_len); if (!wrapped_data) { wpa_printf(MSG_DEBUG, "DPP: Missing required Wrapped data attribute"); return; } wpa_hexdump(MSG_MSGDUMP, "DPP: Wrapped data", wrapped_data, wrapped_data_len); r_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_R_BOOTSTRAP_KEY_HASH, &r_bootstrap_len); if (!r_bootstrap || r_bootstrap > wrapped_data || r_bootstrap_len != SHA256_MAC_LEN) { wpa_printf(MSG_DEBUG, "DPP: 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 > wrapped_data || i_bootstrap_len != SHA256_MAC_LEN) { wpa_printf(MSG_DEBUG, "DPP: 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 */ dl_list_for_each(bi, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info, list) { if (!own_bi && bi->own && os_memcmp(bi->pubkey_hash, r_bootstrap, SHA256_MAC_LEN) == 0) { wpa_printf(MSG_DEBUG, "DPP: Found matching own bootstrapping information"); own_bi = bi; } if (!peer_bi && !bi->own && os_memcmp(bi->pubkey_hash, i_bootstrap, SHA256_MAC_LEN) == 0) { wpa_printf(MSG_DEBUG, "DPP: Found matching peer bootstrapping information"); peer_bi = bi; } if (own_bi && peer_bi) break; } if (!own_bi) { wpa_printf(MSG_DEBUG, "DPP: No matching own bootstrapping key found - ignore message"); return; } if (wpa_s->dpp_auth) { wpa_printf(MSG_DEBUG, "DPP: 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, buf, wrapped_data, wrapped_data_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); wpas_dpp_set_configurator(wpa_s, wpa_s->dpp_auth, wpa_s->dpp_configurator_params); os_memcpy(wpa_s->dpp_auth->peer_mac_addr, src, ETH_ALEN); msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_RESP, wpabuf_len(wpa_s->dpp_auth->resp_attr)); if (!msg) return; wpabuf_put_buf(msg, wpa_s->dpp_auth->resp_attr); offchannel_send_action(wpa_s, wpa_s->dpp_auth->curr_freq, src, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), 500, wpas_dpp_tx_status, 0); wpabuf_free(msg); } 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 wpa_ssid *ssid; 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(auth->ssid_len); if (!ssid->ssid) goto fail; os_memcpy(ssid->ssid, auth->ssid, auth->ssid_len); ssid->ssid_len = auth->ssid_len; if (auth->connector) { ssid->key_mgmt = WPA_KEY_MGMT_DPP; ssid->dpp_connector = os_strdup(auth->connector); if (!ssid->dpp_connector) goto fail; } if (auth->c_sign_key) { ssid->dpp_csign = os_malloc(wpabuf_len(auth->c_sign_key)); if (!ssid->dpp_csign) goto fail; os_memcpy(ssid->dpp_csign, wpabuf_head(auth->c_sign_key), wpabuf_len(auth->c_sign_key)); ssid->dpp_csign_len = wpabuf_len(auth->c_sign_key); ssid->dpp_csign_expiry = auth->c_sign_key_expiry; } 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 (!auth->connector) { ssid->key_mgmt = WPA_KEY_MGMT_PSK; if (auth->passphrase[0]) { if (wpa_config_set_quoted(ssid, "psk", auth->passphrase) < 0) goto fail; wpa_config_update_psk(ssid); ssid->export_keys = 1; } else { ssid->psk_set = auth->psk_set; os_memcpy(ssid->psk, auth->psk, PMK_LEN); } } return ssid; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); return NULL; } static void wpas_dpp_process_config(struct wpa_supplicant *wpa_s, struct dpp_authentication *auth) { struct wpa_ssid *ssid; if (wpa_s->conf->dpp_config_processing < 1) return; ssid = wpas_dpp_add_network(wpa_s, auth); if (!ssid) return; wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_NETWORK_ID "%d", ssid->id); if (wpa_s->conf->dpp_config_processing < 2) return; wpa_printf(MSG_DEBUG, "DPP: Trying to connect to the new network"); ssid->disabled = 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); } 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; if (!auth || !auth->auth_success) { wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress"); return; } if (!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; } wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_RECEIVED); if (auth->ssid_len) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONFOBJ_SSID "%s", wpa_ssid_txt(auth->ssid, auth->ssid_len)); if (auth->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", auth->connector); } if (auth->c_sign_key) { char *hex; size_t hexlen; hexlen = 2 * wpabuf_len(auth->c_sign_key) + 1; hex = os_malloc(hexlen); if (hex) { wpa_snprintf_hex(hex, hexlen, wpabuf_head(auth->c_sign_key), wpabuf_len(auth->c_sign_key)); if (auth->c_sign_key_expiry) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_C_SIGN_KEY "%s %lu", hex, (long unsigned) auth->c_sign_key_expiry); else 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); } } wpas_dpp_process_config(wpa_s, auth); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; return; fail: wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); 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, *conf_req; char json[100]; int res; wpa_s->dpp_gas_client = 1; os_snprintf(json, sizeof(json), "{\"name\":\"Test\"," "\"wi-fi_tech\":\"infra\"," "\"netRole\":\"%s\"}", wpa_s->dpp_netrole_ap ? "ap" : "sta"); wpa_printf(MSG_DEBUG, "DPP: GAS Config Attributes: %s", json); offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); conf_req = dpp_build_conf_req(auth, json); if (!conf_req) { wpa_printf(MSG_DEBUG, "DPP: No configuration request data available"); return; } buf = gas_build_initial_req(0, 10 + 2 + wpabuf_len(conf_req)); if (!buf) { wpabuf_free(conf_req); return; } /* Advertisement Protocol IE */ wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO); wpabuf_put_u8(buf, 8); /* Length */ wpabuf_put_u8(buf, 0x7f); wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); wpabuf_put_u8(buf, 5); wpabuf_put_be24(buf, OUI_WFA); wpabuf_put_u8(buf, DPP_OUI_TYPE); wpabuf_put_u8(buf, 0x01); /* GAS Query */ wpabuf_put_le16(buf, wpabuf_len(conf_req)); wpabuf_put_buf(buf, conf_req); wpabuf_free(conf_req); 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, 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); } } 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); 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 *buf, size_t len) { struct dpp_authentication *auth = wpa_s->dpp_auth; struct wpabuf *msg, *attr; wpa_printf(MSG_DEBUG, "DPP: Authentication Response from " MACSTR, MAC2STR(src)); 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); attr = dpp_auth_resp_rx(auth, buf, len); if (!attr) { 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); msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_CONF, wpabuf_len(attr)); if (!msg) { wpabuf_free(attr); return; } wpabuf_put_buf(msg, attr); wpabuf_free(attr); 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 *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, buf, len) < 0) { wpa_printf(MSG_DEBUG, "DPP: Authentication failed"); return; } wpas_dpp_auth_success(wpa_s, 0); } 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, *pk_hash, *nk_hash; u16 connector_len, pk_hash_len, nk_hash_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; 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; } connector = dpp_get_attr(buf, len, DPP_ATTR_CONNECTOR, &connector_len); if (!connector) { wpa_printf(MSG_DEBUG, "DPP: Peer did not include its Connector"); return; } if (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) < 0) { wpa_printf(MSG_INFO, "DPP: Network Introduction protocol resulted in failure"); goto fail; } pk_hash = dpp_get_attr(buf, len, DPP_ATTR_PEER_NET_PK_HASH, &pk_hash_len); if (!pk_hash || pk_hash_len != SHA256_MAC_LEN) { wpa_printf(MSG_DEBUG, "DPP: Peer did not include SHA256(PK)"); goto fail; } if (os_memcmp(pk_hash, intro.nk_hash, SHA256_MAC_LEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: SHA256(PK) mismatch"); wpa_hexdump(MSG_DEBUG, "DPP: Received SHA256(PK)", pk_hash, pk_hash_len); wpa_hexdump(MSG_DEBUG, "DPP: Calculated SHA256(PK)", intro.nk_hash, SHA256_MAC_LEN); goto fail; } nk_hash = dpp_get_attr(buf, len, DPP_ATTR_OWN_NET_NK_HASH, &nk_hash_len); if (!nk_hash || nk_hash_len != SHA256_MAC_LEN) { wpa_printf(MSG_DEBUG, "DPP: Peer did not include SHA256(NK)"); goto fail; } if (os_memcmp(nk_hash, intro.pk_hash, SHA256_MAC_LEN) != 0) { wpa_printf(MSG_DEBUG, "DPP: SHA256(NK) mismatch"); wpa_hexdump(MSG_DEBUG, "DPP: Received SHA256(NK)", nk_hash, nk_hash_len); wpa_hexdump(MSG_DEBUG, "DPP: Calculated SHA256(NK)", intro.pk_hash, SHA256_MAC_LEN); 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 || expiry > ssid->dpp_csign_expiry) expiry = ssid->dpp_csign_expiry; 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_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 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) { wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR " result=%s (PKEX)", freq, MAC2STR(dst), result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" : (result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" : "FAILED")); /* TODO: Time out wait for response more quickly in error cases? */ } 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->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; 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; } os_memcpy(wpa_s->dpp_pkex->peer_mac, src, ETH_ALEN); msg = dpp_pkex_rx_exchange_resp(wpa_s->dpp_pkex, 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; 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 void wpas_dpp_rx_pkex_commit_reveal_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; struct dpp_pkex *pkex = wpa_s->dpp_pkex; struct dpp_bootstrap_info *bi; 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, buf, len); if (!msg) { wpa_printf(MSG_DEBUG, "DPP: Failed to process the request"); 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; 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); bi = os_zalloc(sizeof(*bi)); if (!bi) return; bi->id = wpas_dpp_next_id(wpa_s); bi->type = DPP_BOOTSTRAP_PKEX; os_memcpy(bi->mac_addr, src, ETH_ALEN); bi->num_freq = 1; bi->freq[0] = freq; bi->curve = pkex->own_bi->curve; bi->pubkey = pkex->peer_bootstrap_key; pkex->peer_bootstrap_key = NULL; dpp_pkex_free(pkex); wpa_s->dpp_pkex = NULL; if (dpp_bootstrap_key_hash(bi) < 0) { dpp_bootstrap_info_free(bi); return; } dl_list_add(&wpa_s->dpp_bootstrap, &bi->list); } static void wpas_dpp_rx_pkex_commit_reveal_resp(struct wpa_supplicant *wpa_s, const u8 *src, const u8 *buf, size_t len, unsigned int freq) { int res; struct dpp_bootstrap_info *bi, *own_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, buf, len); if (res < 0) { wpa_printf(MSG_DEBUG, "DPP: Failed to process the response"); return; } own_bi = pkex->own_bi; bi = os_zalloc(sizeof(*bi)); if (!bi) return; bi->id = wpas_dpp_next_id(wpa_s); bi->type = DPP_BOOTSTRAP_PKEX; os_memcpy(bi->mac_addr, src, ETH_ALEN); bi->num_freq = 1; bi->freq[0] = freq; bi->curve = own_bi->curve; bi->pubkey = pkex->peer_bootstrap_key; pkex->peer_bootstrap_key = NULL; dpp_pkex_free(pkex); wpa_s->dpp_pkex = NULL; if (dpp_bootstrap_key_hash(bi) < 0) { dpp_bootstrap_info_free(bi); return; } dl_list_add(&wpa_s->dpp_bootstrap, &bi->list); 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) { enum dpp_public_action_frame_type type; if (len < 1) return; type = buf[0]; buf++; len--; wpa_printf(MSG_DEBUG, "DPP: Received DPP Public Action frame type %d from " MACSTR " freq=%u", type, MAC2STR(src), freq); wpa_hexdump(MSG_MSGDUMP, "DPP: Received message attributes", buf, len); if (dpp_check_attrs(buf, len) < 0) return; switch (type) { case DPP_PA_AUTHENTICATION_REQ: wpas_dpp_rx_auth_req(wpa_s, src, buf, len, freq); break; case DPP_PA_AUTHENTICATION_RESP: wpas_dpp_rx_auth_resp(wpa_s, src, buf, len); break; case DPP_PA_AUTHENTICATION_CONF: wpas_dpp_rx_auth_conf(wpa_s, src, 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, buf, len, freq); break; case DPP_PA_PKEX_COMMIT_REVEAL_RESP: wpas_dpp_rx_pkex_commit_reveal_resp(wpa_s, src, buf, len, freq); break; default: wpa_printf(MSG_DEBUG, "DPP: Ignored unsupported frame subtype %d", type); break; } } 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; } wpa_hexdump(MSG_DEBUG, "DPP: Received Configuration Request (GAS Query Request)", query, query_len); resp = dpp_conf_req_rx(auth, query, query_len); if (!resp) wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED); 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; } wpa_printf(MSG_DEBUG, "DPP: Configuration exchange completed (ok=%d)", ok); eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); 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); } static unsigned int wpas_dpp_next_configurator_id(struct wpa_supplicant *wpa_s) { struct dpp_configurator *conf; unsigned int max_id = 0; dl_list_for_each(conf, &wpa_s->dpp_configurator, struct dpp_configurator, list) { if (conf->id > max_id) max_id = conf->id; } return max_id + 1; } int wpas_dpp_configurator_add(struct wpa_supplicant *wpa_s, const char *cmd) { char *expiry = NULL, *curve = NULL; char *key = NULL; u8 *privkey = NULL; size_t privkey_len = 0; int ret = -1; struct dpp_configurator *conf = NULL; expiry = get_param(cmd, " expiry="); curve = get_param(cmd, " curve="); key = get_param(cmd, " key="); if (key) { privkey_len = os_strlen(key) / 2; privkey = os_malloc(privkey_len); if (!privkey || hexstr2bin(key, privkey, privkey_len) < 0) goto fail; } conf = dpp_keygen_configurator(curve, privkey, privkey_len); if (!conf) goto fail; if (expiry) { long int val; val = strtol(expiry, NULL, 0); if (val <= 0) goto fail; conf->csign_expiry = val; } conf->id = wpas_dpp_next_configurator_id(wpa_s); dl_list_add(&wpa_s->dpp_configurator, &conf->list); ret = conf->id; conf = NULL; fail: os_free(curve); os_free(expiry); str_clear_free(key); bin_clear_free(privkey, privkey_len); dpp_configurator_free(conf); return ret; } static int dpp_configurator_del(struct wpa_supplicant *wpa_s, unsigned int id) { struct dpp_configurator *conf, *tmp; int found = 0; dl_list_for_each_safe(conf, tmp, &wpa_s->dpp_configurator, struct dpp_configurator, list) { if (id && conf->id != id) continue; found = 1; dl_list_del(&conf->list); dpp_configurator_free(conf); } if (id == 0) return 0; /* flush succeeds regardless of entries found */ return found ? 0 : -1; } int wpas_dpp_configurator_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; } return dpp_configurator_del(wpa_s, id_val); } 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) { wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR " result=%s (DPP Peer Discovery Request)", freq, MAC2STR(dst), result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" : (result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" : "FAILED")); /* 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; if (!(ssid->key_mgmt & WPA_KEY_MGMT_DPP) || !bss) return 0; /* Not using 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_csign_expiry && ssid->dpp_csign_expiry < now.sec) { wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_MISSING_CONNECTOR "C-sign-key expired"); return -1; } if (ssid->dpp_netaccesskey_expiry && 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, 4 + os_strlen(ssid->dpp_connector)); if (!msg) return -1; /* 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); /* TODO: Timeout on AP response */ wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; 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, 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; 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 wpabuf *msg; wpa_printf(MSG_DEBUG, "DPP: Initiating PKEX"); dpp_pkex_free(wpa_s->dpp_pkex); wpa_s->dpp_pkex = dpp_pkex_init(own_bi, wpa_s->own_addr, wpa_s->dpp_pkex_identifier, wpa_s->dpp_pkex_code); if (!wpa_s->dpp_pkex) return -1; msg = wpa_s->dpp_pkex->exchange_req; wait_time = wpa_s->max_remain_on_chan; if (wait_time > 2000) wait_time = 2000; /* TODO: Which channel to use? */ offchannel_send_action(wpa_s, 2437, broadcast, wpa_s->own_addr, broadcast, wpabuf_head(msg), wpabuf_len(msg), wait_time, wpas_dpp_tx_pkex_status, 0); } /* 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; } int wpas_dpp_init(struct wpa_supplicant *wpa_s) { 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; dl_list_init(&wpa_s->dpp_bootstrap); dl_list_init(&wpa_s->dpp_configurator); wpa_s->dpp_init_done = 1; return 0; } 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; os_free(wpa_s->dpp_devices_override); wpa_s->dpp_devices_override = NULL; wpa_s->dpp_ignore_netaccesskey_mismatch = 0; #endif /* CONFIG_TESTING_OPTIONS */ if (!wpa_s->dpp_init_done) return; eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL); offchannel_send_action_done(wpa_s); wpas_dpp_listen_stop(wpa_s); dpp_bootstrap_del(wpa_s, 0); dpp_configurator_del(wpa_s, 0); dpp_auth_deinit(wpa_s->dpp_auth); wpa_s->dpp_auth = NULL; wpas_dpp_pkex_remove(wpa_s, "*"); wpa_s->dpp_pkex = NULL; os_memset(wpa_s->dpp_intro_bssid, 0, ETH_ALEN); os_free(wpa_s->dpp_configurator_params); wpa_s->dpp_configurator_params = NULL; }