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gerrit.omnirom.org / android_external_wpa_supplicant_8 / 6663a1d33a6fa774b2d0326c4450b1689de0e67d / . / wpa_supplicant / dpp_supplicant.c
blob: 152e257e57d08c3ae5d9014429aa8f292812aee0 [file] [log] [blame]
/*
* wpa_supplicant - DPP
* Copyright (c) 2017, Qualcomm Atheros, Inc.
* Copyright (c) 2018, 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 "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"
#include "hidl.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;
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) {
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;
}
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;
}
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",
dpp_bootstrap_type_txt(bi->type),
MAC2STR(bi->mac_addr),
bi->info ? bi->info : "",
bi->num_freq,
bi->curve->name);
}
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_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;
}
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_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);
wpas_notify_dpp_timeout(wpa_s);
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_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;
u8 psk[PMK_LEN];
int psk_set = 0;
char *group_id = NULL;
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;
}
pos = os_strstr(cmd, " psk=");
if (pos) {
pos += 5;
if (hexstr2bin(pos, psk, PMK_LEN) < 0)
goto fail;
psk_set = 1;
}
pos = os_strstr(cmd, " group_id=");
if (pos) {
size_t group_id_len;
pos += 10;
end = os_strchr(pos, ' ');
group_id_len = end ? (size_t) (end - pos) : os_strlen(pos);
group_id = os_malloc(group_id_len + 1);
if (!group_id)
goto fail;
os_memcpy(group_id, pos, group_id_len);
group_id[group_id_len] = '\0';
}
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") ||
os_strstr(cmd, " conf=sta-sae") ||
os_strstr(cmd, " conf=sta-psk-sae")) {
if (os_strstr(cmd, " conf=sta-psk-sae"))
conf_sta->akm = DPP_AKM_PSK_SAE;
else if (os_strstr(cmd, " conf=sta-sae"))
conf_sta->akm = DPP_AKM_SAE;
else
conf_sta->akm = DPP_AKM_PSK;
if (psk_set) {
os_memcpy(conf_sta->psk, psk, PMK_LEN);
} else {
conf_sta->passphrase = os_strdup(pass);
if (!conf_sta->passphrase)
goto fail;
}
} else if (os_strstr(cmd, " conf=sta-dpp")) {
conf_sta->akm = DPP_AKM_DPP;
} else {
goto fail;
}
if (os_strstr(cmd, " group_id=")) {
conf_sta->group_id = group_id;
group_id = NULL;
}
}
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") ||
os_strstr(cmd, " conf=ap-sae") ||
os_strstr(cmd, " conf=ap-psk-sae")) {
if (os_strstr(cmd, " conf=ap-psk-sae"))
conf_ap->akm = DPP_AKM_PSK_SAE;
else if (os_strstr(cmd, " conf=ap-sae"))
conf_ap->akm = DPP_AKM_SAE;
else
conf_ap->akm = DPP_AKM_PSK;
if (psk_set) {
os_memcpy(conf_ap->psk, psk, PMK_LEN);
} else {
conf_ap->passphrase = os_strdup(pass);
if (!conf_ap->passphrase)
goto fail;
}
} else if (os_strstr(cmd, " conf=ap-dpp")) {
conf_ap->akm = DPP_AKM_DPP;
} else {
goto fail;
}
if (os_strstr(cmd, " group_id=")) {
conf_ap->group_id = group_id;
group_id = NULL;
}
}
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;
os_free(group_id);
return;
fail:
wpa_printf(MSG_DEBUG, "DPP: Failed to set configurator parameters");
dpp_configuration_free(conf_sta);
dpp_configuration_free(conf_ap);
os_free(group_id);
}
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);
wpas_notify_dpp_timeout(wpa_s);
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;
u8 allowed_roles = DPP_CAPAB_CONFIGURATOR;
unsigned int neg_freq = 0;
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)
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 (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 = dpp_auth_init(wpa_s, peer_bi, own_bi, allowed_roles,
neg_freq,
wpa_s->hw.modes, wpa_s->hw.num_modes);
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);
wpa_s->dpp_auth->neg_freq = neg_freq;
if (!is_zero_ether_addr(peer_bi->mac_addr))
os_memcpy(wpa_s->dpp_auth->peer_mac_addr, peer_bi->mac_addr,
ETH_ALEN);
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);
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_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_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 *bi, *own_bi = NULL, *peer_bi = NULL;
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 */
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_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");
wpas_notify_dpp_auth_failure(wpa_s);
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);
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 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->ieee80211w = MGMT_FRAME_PROTECTION_REQUIRED;
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);
}
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 = 0;
if (auth->akm == DPP_AKM_PSK || auth->akm == DPP_AKM_PSK_SAE)
ssid->key_mgmt |= WPA_KEY_MGMT_PSK |
WPA_KEY_MGMT_PSK_SHA256 | WPA_KEY_MGMT_FT_PSK;
if (auth->akm == DPP_AKM_SAE || auth->akm == DPP_AKM_PSK_SAE)
ssid->key_mgmt |= WPA_KEY_MGMT_SAE |
WPA_KEY_MGMT_FT_SAE;
ssid->ieee80211w = MGMT_FRAME_PROTECTION_OPTIONAL;
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);
wpas_notify_dpp_config_received(wpa_s, ssid);
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_handle_config_obj(struct wpa_supplicant *wpa_s,
struct dpp_authentication *auth)
{
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));
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);
}
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;
wpa_s->dpp_gas_dialog_token = -1;
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;
}
wpas_dpp_handle_config_obj(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);
wpas_notify_dpp_configuration_failure(wpa_s);
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");
#ifdef CONFIG_TESTING_OPTIONS
if (dpp_test == DPP_TEST_INVALID_CONFIG_ATTR_OBJ_CONF_REQ) {
wpa_printf(MSG_INFO, "DPP: TESTING - invalid Config Attr");
json[29] = 'k'; /* replace "infra" with "knfra" */
}
#endif /* CONFIG_TESTING_OPTIONS */
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,
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);
wpas_notify_dpp_auth_success(wpa_s);
#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");
wpas_notify_dpp_resp_pending(wpa_s);
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_start(wpa_s, auth->curr_freq);
return;
}
wpa_printf(MSG_DEBUG, "DPP: No confirm generated");
wpas_notify_dpp_auth_failure(wpa_s);
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");
wpas_notify_dpp_auth_failure(wpa_s);
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, *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]);
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));
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_pkex *pkex = wpa_s->dpp_pkex;
struct dpp_bootstrap_info *bi;
bi = os_zalloc(sizeof(*bi));
if (!bi)
return NULL;
bi->id = wpas_dpp_next_id(wpa_s);
bi->type = DPP_BOOTSTRAP_PKEX;
os_memcpy(bi->mac_addr, peer, 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 NULL;
}
dl_list_add(&wpa_s->dpp_bootstrap, &bi->list);
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;
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;
}
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);
wpas_notify_dpp_configuration_failure(wpa_s);
}
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);
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_stop(wpa_s);
if (ok) {
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_SENT);
wpas_notify_dpp_config_sent(wpa_s);
}
else {
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED);
wpas_notify_dpp_configuration_failure(wpa_s);
}
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 *curve = NULL;
char *key = NULL;
u8 *privkey = NULL;
size_t privkey_len = 0;
int ret = -1;
struct dpp_configurator *conf = NULL;
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;
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);
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);
}
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_configurator(wpa_s, auth, cmd);
if (dpp_configurator_own_config(auth, curve, 0) == 0) {
wpas_dpp_handle_config_obj(wpa_s, auth);
ret = 0;
}
dpp_auth_deinit(auth);
os_free(curve);
return ret;
}
int wpas_dpp_configurator_get_key(struct wpa_supplicant *wpa_s, unsigned int id,
char *buf, size_t buflen)
{
struct dpp_configurator *conf;
conf = dpp_configurator_get_id(wpa_s, id);
if (!conf)
return -1;
return dpp_configurator_get_key(conf, buf, buflen);
}
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;
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_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, 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)
{
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;
wpa_s->dpp_ignore_netaccesskey_mismatch = 0;
#endif /* CONFIG_TESTING_OPTIONS */
if (!wpa_s->dpp_init_done)
return;
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);
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_stop(wpa_s);
dpp_bootstrap_del(wpa_s, 0);
dpp_configurator_del(wpa_s, 0);
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;
}