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hostap/wpa_supplicant/dpp_supplicant.c
Jouni Malinen e780b4bf20 DPP: Bootstrapping via NFC URI Record 
This extends hostapd and wpa_supplicant DPP implementation to allow the
bootstrapping URI to be generated for and parsed from an NFC Tag with an
NFC URI Record. This is similar to the way the bootstrapping URI is used
with QR Code for unidirectional authentication.

The DPP_BOOTSTRAP_GEN command uses "type=nfc-uri" to request the URI to
be assigned for NFC URI Record. In practice, the URI is generated
identically to the QR Code case, but the internal entry maintains the
NFC-URI type.

A new command "DPP_NFC_URI <uri>" can now be used to parse the URI read
from an NFC Tag with the NFC URI Record. This is similar to the
DPP_QR_CODE command.

Other commands (mainly, DPP_LISTEN and DPP_AUTH_INIT) are used for NFC
URI in the same way as they are used for QR Code.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2019-12-05 12:37:51 +02:00

2602 lines
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/*
* 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;
wpa_s->dpp_netrole_ap = os_strncmp(pos, "ap", 2) == 0;
}
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;
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)
{
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_ap,
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 */
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