hostap/wpa_supplicant/dpp_supplicant.c

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/*
* wpa_supplicant - DPP
* Copyright (c) 2017, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/dpp.h"
#include "common/gas.h"
#include "common/gas_server.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "offchannel.h"
#include "gas_query.h"
#include "dpp_supplicant.h"
static int wpas_dpp_listen_start(struct wpa_supplicant *wpa_s,
unsigned int freq);
static void wpas_dpp_reply_wait_timeout(void *eloop_ctx, void *timeout_ctx);
static void wpas_dpp_auth_success(struct wpa_supplicant *wpa_s, int initiator);
static void wpas_dpp_tx_status(struct wpa_supplicant *wpa_s,
unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid,
const u8 *data, size_t data_len,
enum offchannel_send_action_result result);
static const u8 broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
static struct dpp_configurator *
dpp_configurator_get_id(struct wpa_supplicant *wpa_s, unsigned int id)
{
struct dpp_configurator *conf;
dl_list_for_each(conf, &wpa_s->dpp_configurator,
struct dpp_configurator, list) {
if (conf->id == id)
return conf;
}
return NULL;
}
static unsigned int wpas_dpp_next_id(struct wpa_supplicant *wpa_s)
{
struct dpp_bootstrap_info *bi;
unsigned int max_id = 0;
dl_list_for_each(bi, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info,
list) {
if (bi->id > max_id)
max_id = bi->id;
}
return max_id + 1;
}
/**
* wpas_dpp_qr_code - Parse and add DPP bootstrapping info from a QR Code
* @wpa_s: Pointer to wpa_supplicant data
* @cmd: DPP URI read from a QR Code
* Returns: Identifier of the stored info or -1 on failure
*/
int wpas_dpp_qr_code(struct wpa_supplicant *wpa_s, const char *cmd)
{
struct dpp_bootstrap_info *bi;
struct dpp_authentication *auth = wpa_s->dpp_auth;
bi = dpp_parse_qr_code(cmd);
if (!bi)
return -1;
bi->id = wpas_dpp_next_id(wpa_s);
dl_list_add(&wpa_s->dpp_bootstrap, &bi->list);
if (auth && auth->response_pending &&
dpp_notify_new_qr_code(auth, bi) == 1) {
struct wpabuf *msg;
wpa_printf(MSG_DEBUG,
"DPP: Sending out pending authentication response");
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_RESP,
wpabuf_len(auth->resp_attr));
if (!msg)
goto out;
wpabuf_put_buf(msg, wpa_s->dpp_auth->resp_attr);
offchannel_send_action(wpa_s, auth->curr_freq,
auth->peer_mac_addr, wpa_s->own_addr,
broadcast,
wpabuf_head(msg), wpabuf_len(msg),
500, wpas_dpp_tx_status, 0);
wpabuf_free(msg);
}
out:
return bi->id;
}
static char * get_param(const char *cmd, const char *param)
{
const char *pos, *end;
char *val;
size_t len;
pos = os_strstr(cmd, param);
if (!pos)
return NULL;
pos += os_strlen(param);
end = os_strchr(pos, ' ');
if (end)
len = end - pos;
else
len = os_strlen(pos);
val = os_malloc(len + 1);
if (!val)
return NULL;
os_memcpy(val, pos, len);
val[len] = '\0';
return val;
}
int wpas_dpp_bootstrap_gen(struct wpa_supplicant *wpa_s, const char *cmd)
{
char *chan = NULL, *mac = NULL, *info = NULL, *pk = NULL, *curve = NULL;
char *key = NULL;
u8 *privkey = NULL;
size_t privkey_len = 0;
size_t len;
int ret = -1;
struct dpp_bootstrap_info *bi;
bi = os_zalloc(sizeof(*bi));
if (!bi)
goto fail;
if (os_strstr(cmd, "type=qrcode"))
bi->type = DPP_BOOTSTRAP_QR_CODE;
else
goto fail;
chan = get_param(cmd, " chan=");
mac = get_param(cmd, " mac=");
info = get_param(cmd, " info=");
curve = get_param(cmd, " curve=");
key = get_param(cmd, " key=");
if (key) {
privkey_len = os_strlen(key) / 2;
privkey = os_malloc(privkey_len);
if (!privkey ||
hexstr2bin(key, privkey, privkey_len) < 0)
goto fail;
}
pk = dpp_keygen(bi, curve, privkey, privkey_len);
if (!pk)
goto fail;
len = 4; /* "DPP:" */
if (chan) {
if (dpp_parse_uri_chan_list(bi, chan) < 0)
goto fail;
len += 3 + os_strlen(chan); /* C:...; */
}
if (mac) {
if (dpp_parse_uri_mac(bi, mac) < 0)
goto fail;
len += 3 + os_strlen(mac); /* M:...; */
}
if (info) {
if (dpp_parse_uri_info(bi, info) < 0)
goto fail;
len += 3 + os_strlen(info); /* I:...; */
}
len += 4 + os_strlen(pk);
bi->uri = os_malloc(len + 1);
if (!bi->uri)
goto fail;
os_snprintf(bi->uri, len + 1, "DPP:%s%s%s%s%s%s%s%s%sK:%s;;",
chan ? "C:" : "", chan ? chan : "", chan ? ";" : "",
mac ? "M:" : "", mac ? mac : "", mac ? ";" : "",
info ? "I:" : "", info ? info : "", info ? ";" : "",
pk);
bi->id = wpas_dpp_next_id(wpa_s);
dl_list_add(&wpa_s->dpp_bootstrap, &bi->list);
ret = bi->id;
bi = NULL;
fail:
os_free(curve);
os_free(pk);
os_free(chan);
os_free(mac);
os_free(info);
str_clear_free(key);
bin_clear_free(privkey, privkey_len);
dpp_bootstrap_info_free(bi);
return ret;
}
static struct dpp_bootstrap_info *
dpp_bootstrap_get_id(struct wpa_supplicant *wpa_s, unsigned int id)
{
struct dpp_bootstrap_info *bi;
dl_list_for_each(bi, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info,
list) {
if (bi->id == id)
return bi;
}
return NULL;
}
static int dpp_bootstrap_del(struct wpa_supplicant *wpa_s, unsigned int id)
{
struct dpp_bootstrap_info *bi, *tmp;
int found = 0;
dl_list_for_each_safe(bi, tmp, &wpa_s->dpp_bootstrap,
struct dpp_bootstrap_info, list) {
if (id && bi->id != id)
continue;
found = 1;
dl_list_del(&bi->list);
dpp_bootstrap_info_free(bi);
}
if (id == 0)
return 0; /* flush succeeds regardless of entries found */
return found ? 0 : -1;
}
int wpas_dpp_bootstrap_remove(struct wpa_supplicant *wpa_s, const char *id)
{
unsigned int id_val;
if (os_strcmp(id, "*") == 0) {
id_val = 0;
} else {
id_val = atoi(id);
if (id_val == 0)
return -1;
}
return dpp_bootstrap_del(wpa_s, id_val);
}
const char * wpas_dpp_bootstrap_get_uri(struct wpa_supplicant *wpa_s,
unsigned int id)
{
struct dpp_bootstrap_info *bi;
bi = dpp_bootstrap_get_id(wpa_s, id);
if (!bi)
return NULL;
return bi->uri;
}
static void wpas_dpp_tx_status(struct wpa_supplicant *wpa_s,
unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid,
const u8 *data, size_t data_len,
enum offchannel_send_action_result result)
{
wpa_printf(MSG_DEBUG, "DPP: TX status: freq=%u dst=" MACSTR
" result=%s",
freq, MAC2STR(dst),
result == OFFCHANNEL_SEND_ACTION_SUCCESS ? "SUCCESS" :
(result == OFFCHANNEL_SEND_ACTION_NO_ACK ? "no-ACK" :
"FAILED"));
if (!wpa_s->dpp_auth) {
wpa_printf(MSG_DEBUG,
"DPP: Ignore TX status since there is no ongoing authentication exchange");
return;
}
if (wpa_s->dpp_auth->remove_on_tx_status) {
wpa_printf(MSG_DEBUG,
"DPP: Terminate authentication exchange due to an earlier error");
eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL);
offchannel_send_action_done(wpa_s);
dpp_auth_deinit(wpa_s->dpp_auth);
wpa_s->dpp_auth = NULL;
return;
}
if (wpa_s->dpp_auth_ok_on_ack)
wpas_dpp_auth_success(wpa_s, 1);
if (!is_broadcast_ether_addr(dst) &&
result != OFFCHANNEL_SEND_ACTION_SUCCESS) {
wpa_printf(MSG_DEBUG,
"DPP: Unicast DPP Action frame was not ACKed");
/* TODO: In case of DPP Authentication Request frame, move to
* the next channel immediately */
}
}
static void wpas_dpp_reply_wait_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (!wpa_s->dpp_auth)
return;
wpa_printf(MSG_DEBUG, "DPP: Continue reply wait on channel %u MHz",
wpa_s->dpp_auth->curr_freq);
wpas_dpp_listen_start(wpa_s, wpa_s->dpp_auth->curr_freq);
}
static void wpas_dpp_set_testing_options(struct wpa_supplicant *wpa_s,
struct dpp_authentication *auth)
{
#ifdef CONFIG_TESTING_OPTIONS
if (wpa_s->dpp_config_obj_override)
auth->config_obj_override =
os_strdup(wpa_s->dpp_config_obj_override);
if (wpa_s->dpp_discovery_override)
auth->discovery_override =
os_strdup(wpa_s->dpp_discovery_override);
if (wpa_s->dpp_groups_override)
auth->groups_override =
os_strdup(wpa_s->dpp_groups_override);
if (wpa_s->dpp_devices_override)
auth->devices_override =
os_strdup(wpa_s->dpp_devices_override);
auth->ignore_netaccesskey_mismatch =
wpa_s->dpp_ignore_netaccesskey_mismatch;
#endif /* CONFIG_TESTING_OPTIONS */
}
int wpas_dpp_auth_init(struct wpa_supplicant *wpa_s, const char *cmd)
{
const char *pos;
struct dpp_bootstrap_info *peer_bi, *own_bi = NULL;
struct wpabuf *msg;
const u8 *dst;
int res;
int configurator = 1;
unsigned int wait_time;
struct dpp_configuration *conf_sta = NULL, *conf_ap = NULL;
struct dpp_configurator *conf = NULL;
wpa_s->dpp_gas_client = 0;
pos = os_strstr(cmd, " peer=");
if (!pos)
return -1;
pos += 6;
peer_bi = dpp_bootstrap_get_id(wpa_s, atoi(pos));
if (!peer_bi) {
wpa_printf(MSG_INFO,
"DPP: Could not find bootstrapping info for the identified peer");
return -1;
}
pos = os_strstr(cmd, " own=");
if (pos) {
pos += 5;
own_bi = dpp_bootstrap_get_id(wpa_s, atoi(pos));
if (!own_bi) {
wpa_printf(MSG_INFO,
"DPP: Could not find bootstrapping info for the identified local entry");
return -1;
}
if (peer_bi->curve != own_bi->curve) {
wpa_printf(MSG_INFO,
"DPP: Mismatching curves in bootstrapping info (peer=%s own=%s)",
peer_bi->curve->name, own_bi->curve->name);
return -1;
}
}
pos = os_strstr(cmd, " role=");
if (pos) {
pos += 6;
if (os_strncmp(pos, "configurator", 12) == 0)
configurator = 1;
else if (os_strncmp(pos, "enrollee", 8) == 0)
configurator = 0;
else
goto fail;
}
pos = os_strstr(cmd, " netrole=");
if (pos) {
pos += 9;
wpa_s->dpp_netrole_ap = os_strncmp(pos, "ap", 2) == 0;
}
if (os_strstr(cmd, " conf=sta-")) {
conf_sta = os_zalloc(sizeof(struct dpp_configuration));
if (!conf_sta)
goto fail;
/* TODO: Configuration of network parameters from upper layers
*/
os_memcpy(conf_sta->ssid, "test", 4);
conf_sta->ssid_len = 4;
if (os_strstr(cmd, " conf=sta-psk")) {
conf_sta->dpp = 0;
conf_sta->passphrase = os_strdup("secret passphrase");
if (!conf_sta->passphrase)
goto fail;
} else if (os_strstr(cmd, " conf=sta-dpp")) {
conf_sta->dpp = 1;
} else {
goto fail;
}
}
if (os_strstr(cmd, " conf=ap-")) {
conf_ap = os_zalloc(sizeof(struct dpp_configuration));
if (!conf_ap)
goto fail;
/* TODO: Configuration of network parameters from upper layers
*/
os_memcpy(conf_ap->ssid, "test", 4);
conf_ap->ssid_len = 4;
if (os_strstr(cmd, " conf=ap-psk")) {
conf_ap->dpp = 0;
conf_ap->passphrase = os_strdup("secret passphrase");
if (!conf_ap->passphrase)
goto fail;
} else if (os_strstr(cmd, " conf=ap-dpp")) {
conf_ap->dpp = 1;
} else {
goto fail;
}
}
pos = os_strstr(cmd, " expiry=");
if (pos) {
long int val;
pos += 8;
val = strtol(pos, NULL, 0);
if (val <= 0)
goto fail;
if (conf_sta)
conf_sta->netaccesskey_expiry = val;
if (conf_ap)
conf_ap->netaccesskey_expiry = val;
}
pos = os_strstr(cmd, " configurator=");
if (pos) {
pos += 14;
conf = dpp_configurator_get_id(wpa_s, atoi(pos));
if (!conf) {
wpa_printf(MSG_INFO,
"DPP: Could not find the specified configurator");
goto fail;
}
}
if (wpa_s->dpp_auth) {
eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL);
offchannel_send_action_done(wpa_s);
dpp_auth_deinit(wpa_s->dpp_auth);
}
wpa_s->dpp_auth = dpp_auth_init(wpa_s, peer_bi, own_bi, configurator);
if (!wpa_s->dpp_auth)
goto fail;
wpas_dpp_set_testing_options(wpa_s, wpa_s->dpp_auth);
wpa_s->dpp_auth->conf_sta = conf_sta;
wpa_s->dpp_auth->conf_ap = conf_ap;
wpa_s->dpp_auth->conf = conf;
/* TODO: Support iteration over all frequencies and filtering of
* frequencies based on locally enabled channels that allow initiation
* of transmission. */
if (peer_bi->num_freq > 0)
wpa_s->dpp_auth->curr_freq = peer_bi->freq[0];
else
wpa_s->dpp_auth->curr_freq = 2412;
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_REQ,
wpabuf_len(wpa_s->dpp_auth->req_attr));
if (!msg)
return -1;
wpabuf_put_buf(msg, wpa_s->dpp_auth->req_attr);
if (is_zero_ether_addr(peer_bi->mac_addr)) {
dst = broadcast;
} else {
dst = peer_bi->mac_addr;
os_memcpy(wpa_s->dpp_auth->peer_mac_addr, peer_bi->mac_addr,
ETH_ALEN);
}
wpa_s->dpp_auth_ok_on_ack = 0;
eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL);
wait_time = wpa_s->max_remain_on_chan;
if (wait_time > 2000)
wait_time = 2000;
eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000,
wpas_dpp_reply_wait_timeout,
wpa_s, NULL);
res = offchannel_send_action(wpa_s, wpa_s->dpp_auth->curr_freq,
dst, wpa_s->own_addr, broadcast,
wpabuf_head(msg), wpabuf_len(msg),
wait_time, wpas_dpp_tx_status, 0);
wpabuf_free(msg);
return res;
fail:
dpp_configuration_free(conf_sta);
dpp_configuration_free(conf_ap);
return -1;
}
struct wpas_dpp_listen_work {
unsigned int freq;
unsigned int duration;
struct wpabuf *probe_resp_ie;
};
static void wpas_dpp_listen_work_free(struct wpas_dpp_listen_work *lwork)
{
if (!lwork)
return;
os_free(lwork);
}
static void wpas_dpp_listen_work_done(struct wpa_supplicant *wpa_s)
{
struct wpas_dpp_listen_work *lwork;
if (!wpa_s->dpp_listen_work)
return;
lwork = wpa_s->dpp_listen_work->ctx;
wpas_dpp_listen_work_free(lwork);
radio_work_done(wpa_s->dpp_listen_work);
wpa_s->dpp_listen_work = NULL;
}
static void dpp_start_listen_cb(struct wpa_radio_work *work, int deinit)
{
struct wpa_supplicant *wpa_s = work->wpa_s;
struct wpas_dpp_listen_work *lwork = work->ctx;
if (deinit) {
if (work->started) {
wpa_s->dpp_listen_work = NULL;
wpas_dpp_listen_stop(wpa_s);
}
wpas_dpp_listen_work_free(lwork);
return;
}
wpa_s->dpp_listen_work = work;
wpa_s->dpp_pending_listen_freq = lwork->freq;
if (wpa_drv_remain_on_channel(wpa_s, lwork->freq,
wpa_s->max_remain_on_chan) < 0) {
wpa_printf(MSG_DEBUG,
"DPP: Failed to request the driver to remain on channel (%u MHz) for listen",
lwork->freq);
wpas_dpp_listen_work_done(wpa_s);
wpa_s->dpp_pending_listen_freq = 0;
return;
}
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = lwork->freq;
}
static int wpas_dpp_listen_start(struct wpa_supplicant *wpa_s,
unsigned int freq)
{
struct wpas_dpp_listen_work *lwork;
if (wpa_s->dpp_listen_work) {
wpa_printf(MSG_DEBUG,
"DPP: Reject start_listen since dpp_listen_work already exists");
return -1;
}
if (wpa_s->dpp_listen_freq)
wpas_dpp_listen_stop(wpa_s);
wpa_s->dpp_listen_freq = freq;
lwork = os_zalloc(sizeof(*lwork));
if (!lwork)
return -1;
lwork->freq = freq;
if (radio_add_work(wpa_s, freq, "dpp-listen", 0, dpp_start_listen_cb,
lwork) < 0) {
wpas_dpp_listen_work_free(lwork);
return -1;
}
return 0;
}
int wpas_dpp_listen(struct wpa_supplicant *wpa_s, const char *cmd)
{
int freq;
freq = atoi(cmd);
if (freq <= 0)
return -1;
if (os_strstr(cmd, " role=configurator"))
wpa_s->dpp_allowed_roles = DPP_CAPAB_CONFIGURATOR;
else if (os_strstr(cmd, " role=enrollee"))
wpa_s->dpp_allowed_roles = DPP_CAPAB_ENROLLEE;
else
wpa_s->dpp_allowed_roles = DPP_CAPAB_CONFIGURATOR |
DPP_CAPAB_ENROLLEE;
wpa_s->dpp_qr_mutual = os_strstr(cmd, " qr=mutual") != NULL;
wpa_s->dpp_netrole_ap = os_strstr(cmd, " netrole=ap") != NULL;
if (wpa_s->dpp_listen_freq == (unsigned int) freq) {
wpa_printf(MSG_DEBUG, "DPP: Already listening on %u MHz",
freq);
return 0;
}
return wpas_dpp_listen_start(wpa_s, freq);
}
void wpas_dpp_listen_stop(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->dpp_listen_freq)
return;
wpa_printf(MSG_DEBUG, "DPP: Stop listen on %u MHz",
wpa_s->dpp_listen_freq);
wpa_drv_cancel_remain_on_channel(wpa_s);
wpa_s->dpp_listen_freq = 0;
wpas_dpp_listen_work_done(wpa_s);
}
void wpas_dpp_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
unsigned int freq)
{
if (!wpa_s->dpp_listen_freq && !wpa_s->dpp_pending_listen_freq)
return;
wpa_printf(MSG_DEBUG,
"DPP: remain-on-channel callback (off_channel_freq=%u dpp_pending_listen_freq=%d roc_waiting_drv_freq=%d freq=%u)",
wpa_s->off_channel_freq, wpa_s->dpp_pending_listen_freq,
wpa_s->roc_waiting_drv_freq, freq);
if (wpa_s->off_channel_freq &&
wpa_s->off_channel_freq == wpa_s->dpp_pending_listen_freq) {
wpa_printf(MSG_DEBUG, "DPP: Listen on %u MHz started", freq);
wpa_s->dpp_pending_listen_freq = 0;
} else {
wpa_printf(MSG_DEBUG,
"DPP: Ignore remain-on-channel callback (off_channel_freq=%u dpp_pending_listen_freq=%d freq=%u)",
wpa_s->off_channel_freq,
wpa_s->dpp_pending_listen_freq, freq);
}
}
void wpas_dpp_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
unsigned int freq)
{
wpas_dpp_listen_work_done(wpa_s);
if (wpa_s->dpp_auth && !wpa_s->dpp_gas_client) {
/* Continue listen with a new remain-on-channel */
wpa_printf(MSG_DEBUG,
"DPP: Continue wait on %u MHz for the ongoing DPP provisioning session",
wpa_s->dpp_auth->curr_freq);
wpas_dpp_listen_start(wpa_s, wpa_s->dpp_auth->curr_freq);
return;
}
if (wpa_s->dpp_listen_freq) {
/* Continue listen with a new remain-on-channel */
wpas_dpp_listen_start(wpa_s, wpa_s->dpp_listen_freq);
}
}
static void wpas_dpp_rx_auth_req(struct wpa_supplicant *wpa_s, const u8 *src,
const u8 *buf, size_t len, unsigned int freq)
{
const u8 *r_bootstrap, *i_bootstrap, *wrapped_data;
u16 r_bootstrap_len, i_bootstrap_len, wrapped_data_len;
struct dpp_bootstrap_info *bi, *own_bi = NULL, *peer_bi = NULL;
struct wpabuf *msg;
wpa_printf(MSG_DEBUG, "DPP: Authentication Request from " MACSTR,
MAC2STR(src));
wrapped_data = dpp_get_attr(buf, len, DPP_ATTR_WRAPPED_DATA,
&wrapped_data_len);
if (!wrapped_data) {
wpa_printf(MSG_DEBUG,
"DPP: Missing required Wrapped data attribute");
return;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Wrapped data",
wrapped_data, wrapped_data_len);
r_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_R_BOOTSTRAP_KEY_HASH,
&r_bootstrap_len);
if (!r_bootstrap || r_bootstrap > wrapped_data ||
r_bootstrap_len != SHA256_MAC_LEN) {
wpa_printf(MSG_DEBUG,
"DPP: Missing or invalid required Responder Bootstrapping Key Hash attribute");
return;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Responder Bootstrapping Key Hash",
r_bootstrap, r_bootstrap_len);
i_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_I_BOOTSTRAP_KEY_HASH,
&i_bootstrap_len);
if (!i_bootstrap || i_bootstrap > wrapped_data ||
i_bootstrap_len != SHA256_MAC_LEN) {
wpa_printf(MSG_DEBUG,
"DPP: Missing or invalid required Initiator Bootstrapping Key Hash attribute");
return;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Initiator Bootstrapping Key Hash",
i_bootstrap, i_bootstrap_len);
/* Try to find own and peer bootstrapping key matches based on the
* received hash values */
dl_list_for_each(bi, &wpa_s->dpp_bootstrap, struct dpp_bootstrap_info,
list) {
if (!own_bi && bi->own &&
os_memcmp(bi->pubkey_hash, r_bootstrap,
SHA256_MAC_LEN) == 0) {
wpa_printf(MSG_DEBUG,
"DPP: Found matching own bootstrapping information");
own_bi = bi;
}
if (!peer_bi && !bi->own &&
os_memcmp(bi->pubkey_hash, i_bootstrap,
SHA256_MAC_LEN) == 0) {
wpa_printf(MSG_DEBUG,
"DPP: Found matching peer bootstrapping information");
peer_bi = bi;
}
if (own_bi && peer_bi)
break;
}
if (!own_bi) {
wpa_printf(MSG_DEBUG,
"DPP: No matching own bootstrapping key found - ignore message");
return;
}
if (wpa_s->dpp_auth) {
wpa_printf(MSG_DEBUG,
"DPP: Already in DPP authentication exchange - ignore new one");
return;
}
wpa_s->dpp_gas_client = 0;
wpa_s->dpp_auth_ok_on_ack = 0;
wpa_s->dpp_auth = dpp_auth_req_rx(wpa_s, wpa_s->dpp_allowed_roles,
wpa_s->dpp_qr_mutual,
peer_bi, own_bi, freq, buf,
wrapped_data, wrapped_data_len);
if (!wpa_s->dpp_auth) {
wpa_printf(MSG_DEBUG, "DPP: No response generated");
return;
}
wpas_dpp_set_testing_options(wpa_s, wpa_s->dpp_auth);
os_memcpy(wpa_s->dpp_auth->peer_mac_addr, src, ETH_ALEN);
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_RESP,
wpabuf_len(wpa_s->dpp_auth->resp_attr));
if (!msg)
return;
wpabuf_put_buf(msg, wpa_s->dpp_auth->resp_attr);
offchannel_send_action(wpa_s, wpa_s->dpp_auth->curr_freq,
src, wpa_s->own_addr, broadcast,
wpabuf_head(msg), wpabuf_len(msg),
500, wpas_dpp_tx_status, 0);
wpabuf_free(msg);
}
static void wpas_dpp_start_gas_server(struct wpa_supplicant *wpa_s)
{
/* TODO: stop wait and start ROC */
}
static void wpas_dpp_gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos;
struct dpp_authentication *auth = wpa_s->dpp_auth;
if (!auth || !auth->auth_success) {
wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress");
return;
}
if (!resp || status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "DPP: GAS query did not succeed");
goto fail;
}
wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Response adv_proto",
adv_proto);
wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Response (GAS response)",
resp);
if (wpabuf_len(adv_proto) != 10 ||
!(pos = wpabuf_head(adv_proto)) ||
pos[0] != WLAN_EID_ADV_PROTO ||
pos[1] != 8 ||
pos[3] != WLAN_EID_VENDOR_SPECIFIC ||
pos[4] != 5 ||
WPA_GET_BE24(&pos[5]) != OUI_WFA ||
pos[8] != 0x1a ||
pos[9] != 1) {
wpa_printf(MSG_DEBUG,
"DPP: Not a DPP Advertisement Protocol ID");
goto fail;
}
if (dpp_conf_resp_rx(auth, resp) < 0) {
wpa_printf(MSG_DEBUG, "DPP: Configuration attempt failed");
goto fail;
}
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_RECEIVED);
if (auth->ssid_len)
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONFOBJ_SSID "%s",
wpa_ssid_txt(auth->ssid, auth->ssid_len));
if (auth->connector) {
/* TODO: Save the Connector and consider using a command
* to fetch the value instead of sending an event with
* it. The Connector could end up being larger than what
* most clients are ready to receive as an event
* message. */
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONNECTOR "%s",
auth->connector);
}
if (auth->c_sign_key) {
char *hex;
size_t hexlen;
hexlen = 2 * wpabuf_len(auth->c_sign_key) + 1;
hex = os_malloc(hexlen);
if (hex) {
wpa_snprintf_hex(hex, hexlen,
wpabuf_head(auth->c_sign_key),
wpabuf_len(auth->c_sign_key));
if (auth->c_sign_key_expiry)
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_C_SIGN_KEY
"%s %lu", hex,
(long unsigned)
auth->c_sign_key_expiry);
else
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_C_SIGN_KEY
"%s", hex);
os_free(hex);
}
}
if (auth->net_access_key) {
char *hex;
size_t hexlen;
hexlen = 2 * wpabuf_len(auth->net_access_key) + 1;
hex = os_malloc(hexlen);
if (hex) {
wpa_snprintf_hex(hex, hexlen,
wpabuf_head(auth->net_access_key),
wpabuf_len(auth->net_access_key));
if (auth->net_access_key_expiry)
wpa_msg(wpa_s, MSG_INFO,
DPP_EVENT_NET_ACCESS_KEY "%s %lu", hex,
(long unsigned)
auth->net_access_key_expiry);
else
wpa_msg(wpa_s, MSG_INFO,
DPP_EVENT_NET_ACCESS_KEY "%s", hex);
os_free(hex);
}
}
dpp_auth_deinit(wpa_s->dpp_auth);
wpa_s->dpp_auth = NULL;
return;
fail:
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED);
dpp_auth_deinit(wpa_s->dpp_auth);
wpa_s->dpp_auth = NULL;
}
static void wpas_dpp_start_gas_client(struct wpa_supplicant *wpa_s)
{
struct dpp_authentication *auth = wpa_s->dpp_auth;
struct wpabuf *buf, *conf_req;
char json[100];
int res;
wpa_s->dpp_gas_client = 1;
os_snprintf(json, sizeof(json),
"{\"name\":\"Test\","
"\"wi-fi_tech\":\"infra\","
"\"netRole\":\"%s\"}",
wpa_s->dpp_netrole_ap ? "ap" : "sta");
wpa_printf(MSG_DEBUG, "DPP: GAS Config Attributes: %s", json);
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_stop(wpa_s);
conf_req = dpp_build_conf_req(auth, json);
if (!conf_req) {
wpa_printf(MSG_DEBUG,
"DPP: No configuration request data available");
return;
}
buf = gas_build_initial_req(0, 10 + 2 + wpabuf_len(conf_req));
if (!buf) {
wpabuf_free(conf_req);
return;
}
/* Advertisement Protocol IE */
wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
wpabuf_put_u8(buf, 8); /* Length */
wpabuf_put_u8(buf, 0x7f);
wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
wpabuf_put_u8(buf, 5);
wpabuf_put_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, DPP_OUI_TYPE);
wpabuf_put_u8(buf, 0x01);
/* GAS Query */
wpabuf_put_le16(buf, wpabuf_len(conf_req));
wpabuf_put_buf(buf, conf_req);
wpabuf_free(conf_req);
wpa_printf(MSG_DEBUG, "DPP: GAS request to " MACSTR " (freq %u MHz)",
MAC2STR(auth->peer_mac_addr), auth->curr_freq);
res = gas_query_req(wpa_s->gas, auth->peer_mac_addr, auth->curr_freq,
buf, wpas_dpp_gas_resp_cb, wpa_s);
if (res < 0) {
wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request");
wpabuf_free(buf);
} else {
wpa_printf(MSG_DEBUG,
"DPP: GAS query started with dialog token %u", res);
}
}
static void wpas_dpp_auth_success(struct wpa_supplicant *wpa_s, int initiator)
{
wpa_printf(MSG_DEBUG, "DPP: Authentication succeeded");
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_AUTH_SUCCESS "init=%d", initiator);
if (wpa_s->dpp_auth->configurator)
wpas_dpp_start_gas_server(wpa_s);
else
wpas_dpp_start_gas_client(wpa_s);
}
static void wpas_dpp_rx_auth_resp(struct wpa_supplicant *wpa_s, const u8 *src,
const u8 *buf, size_t len)
{
struct dpp_authentication *auth = wpa_s->dpp_auth;
struct wpabuf *msg, *attr;
wpa_printf(MSG_DEBUG, "DPP: Authentication Response from " MACSTR,
MAC2STR(src));
if (!auth) {
wpa_printf(MSG_DEBUG,
"DPP: No DPP Authentication in progress - drop");
return;
}
if (!is_zero_ether_addr(auth->peer_mac_addr) &&
os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected "
MACSTR ") - drop", MAC2STR(auth->peer_mac_addr));
return;
}
eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL);
attr = dpp_auth_resp_rx(auth, buf, len);
if (!attr) {
if (auth->auth_resp_status == DPP_STATUS_RESPONSE_PENDING) {
wpa_printf(MSG_DEBUG,
"DPP: Start wait for full response");
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_start(wpa_s, auth->curr_freq);
return;
}
wpa_printf(MSG_DEBUG, "DPP: No confirm generated");
return;
}
os_memcpy(auth->peer_mac_addr, src, ETH_ALEN);
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_CONF, wpabuf_len(attr));
if (!msg) {
wpabuf_free(attr);
return;
}
wpabuf_put_buf(msg, attr);
wpabuf_free(attr);
offchannel_send_action(wpa_s, auth->curr_freq,
src, wpa_s->own_addr, broadcast,
wpabuf_head(msg), wpabuf_len(msg),
500, wpas_dpp_tx_status, 0);
wpabuf_free(msg);
wpa_s->dpp_auth_ok_on_ack = 1;
}
static void wpas_dpp_rx_auth_conf(struct wpa_supplicant *wpa_s, const u8 *src,
const u8 *buf, size_t len)
{
struct dpp_authentication *auth = wpa_s->dpp_auth;
wpa_printf(MSG_DEBUG, "DPP: Authentication Confirmation from " MACSTR,
MAC2STR(src));
if (!auth) {
wpa_printf(MSG_DEBUG,
"DPP: No DPP Authentication in progress - drop");
return;
}
if (os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected "
MACSTR ") - drop", MAC2STR(auth->peer_mac_addr));
return;
}
if (dpp_auth_conf_rx(auth, buf, len) < 0) {
wpa_printf(MSG_DEBUG, "DPP: Authentication failed");
return;
}
wpas_dpp_auth_success(wpa_s, 0);
}
void wpas_dpp_rx_action(struct wpa_supplicant *wpa_s, const u8 *src,
const u8 *buf, size_t len, unsigned int freq)
{
enum dpp_public_action_frame_type type;
if (len < 1)
return;
type = buf[0];
buf++;
len--;
wpa_printf(MSG_DEBUG,
"DPP: Received DPP Public Action frame type %d from "
MACSTR " freq=%u",
type, MAC2STR(src), freq);
wpa_hexdump(MSG_MSGDUMP, "DPP: Received message attributes", buf, len);
if (dpp_check_attrs(buf, len) < 0)
return;
switch (type) {
case DPP_PA_AUTHENTICATION_REQ:
wpas_dpp_rx_auth_req(wpa_s, src, buf, len, freq);
break;
case DPP_PA_AUTHENTICATION_RESP:
wpas_dpp_rx_auth_resp(wpa_s, src, buf, len);
break;
case DPP_PA_AUTHENTICATION_CONF:
wpas_dpp_rx_auth_conf(wpa_s, src, buf, len);
break;
default:
wpa_printf(MSG_DEBUG,
"DPP: Ignored unsupported frame subtype %d", type);
break;
}
}
static struct wpabuf *
wpas_dpp_gas_req_handler(void *ctx, const u8 *sa, const u8 *query,
size_t query_len)
{
struct wpa_supplicant *wpa_s = ctx;
struct dpp_authentication *auth = wpa_s->dpp_auth;
struct wpabuf *resp;
wpa_printf(MSG_DEBUG, "DPP: GAS request from " MACSTR,
MAC2STR(sa));
if (!auth || !auth->auth_success ||
os_memcmp(sa, auth->peer_mac_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress");
return NULL;
}
wpa_hexdump(MSG_DEBUG,
"DPP: Received Configuration Request (GAS Query Request)",
query, query_len);
resp = dpp_conf_req_rx(auth, query, query_len);
if (!resp)
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED);
return resp;
}
static void
wpas_dpp_gas_status_handler(void *ctx, struct wpabuf *resp, int ok)
{
struct wpa_supplicant *wpa_s = ctx;
struct dpp_authentication *auth = wpa_s->dpp_auth;
if (!auth) {
wpabuf_free(resp);
return;
}
wpa_printf(MSG_DEBUG, "DPP: Configuration exchange completed (ok=%d)",
ok);
eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL);
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_stop(wpa_s);
if (ok)
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_SENT);
else
wpa_msg(wpa_s, MSG_INFO, DPP_EVENT_CONF_FAILED);
dpp_auth_deinit(wpa_s->dpp_auth);
wpa_s->dpp_auth = NULL;
wpabuf_free(resp);
}
static unsigned int wpas_dpp_next_configurator_id(struct wpa_supplicant *wpa_s)
{
struct dpp_configurator *conf;
unsigned int max_id = 0;
dl_list_for_each(conf, &wpa_s->dpp_configurator,
struct dpp_configurator, list) {
if (conf->id > max_id)
max_id = conf->id;
}
return max_id + 1;
}
int wpas_dpp_configurator_add(struct wpa_supplicant *wpa_s, const char *cmd)
{
char *expiry = NULL, *curve = NULL;
char *key = NULL;
u8 *privkey = NULL;
size_t privkey_len = 0;
int ret = -1;
struct dpp_configurator *conf = NULL;
expiry = get_param(cmd, " expiry=");
curve = get_param(cmd, " curve=");
key = get_param(cmd, " key=");
if (key) {
privkey_len = os_strlen(key) / 2;
privkey = os_malloc(privkey_len);
if (!privkey ||
hexstr2bin(key, privkey, privkey_len) < 0)
goto fail;
}
conf = dpp_keygen_configurator(curve, privkey, privkey_len);
if (!conf)
goto fail;
if (expiry) {
long int val;
val = strtol(expiry, NULL, 0);
if (val <= 0)
goto fail;
conf->csign_expiry = val;
}
conf->id = wpas_dpp_next_configurator_id(wpa_s);
dl_list_add(&wpa_s->dpp_configurator, &conf->list);
ret = conf->id;
conf = NULL;
fail:
os_free(curve);
os_free(expiry);
str_clear_free(key);
bin_clear_free(privkey, privkey_len);
dpp_configurator_free(conf);
return ret;
}
static int dpp_configurator_del(struct wpa_supplicant *wpa_s, unsigned int id)
{
struct dpp_configurator *conf, *tmp;
int found = 0;
dl_list_for_each_safe(conf, tmp, &wpa_s->dpp_configurator,
struct dpp_configurator, list) {
if (id && conf->id != id)
continue;
found = 1;
dl_list_del(&conf->list);
dpp_configurator_free(conf);
}
if (id == 0)
return 0; /* flush succeeds regardless of entries found */
return found ? 0 : -1;
}
int wpas_dpp_configurator_remove(struct wpa_supplicant *wpa_s, const char *id)
{
unsigned int id_val;
if (os_strcmp(id, "*") == 0) {
id_val = 0;
} else {
id_val = atoi(id);
if (id_val == 0)
return -1;
}
return dpp_configurator_del(wpa_s, id_val);
}
int wpas_dpp_init(struct wpa_supplicant *wpa_s)
{
u8 adv_proto_id[7];
adv_proto_id[0] = WLAN_EID_VENDOR_SPECIFIC;
adv_proto_id[1] = 5;
WPA_PUT_BE24(&adv_proto_id[2], OUI_WFA);
adv_proto_id[5] = DPP_OUI_TYPE;
adv_proto_id[6] = 0x01;
if (gas_server_register(wpa_s->gas_server, adv_proto_id,
sizeof(adv_proto_id), wpas_dpp_gas_req_handler,
wpas_dpp_gas_status_handler, wpa_s) < 0)
return -1;
dl_list_init(&wpa_s->dpp_bootstrap);
dl_list_init(&wpa_s->dpp_configurator);
wpa_s->dpp_init_done = 1;
return 0;
}
void wpas_dpp_deinit(struct wpa_supplicant *wpa_s)
{
#ifdef CONFIG_TESTING_OPTIONS
os_free(wpa_s->dpp_config_obj_override);
wpa_s->dpp_config_obj_override = NULL;
os_free(wpa_s->dpp_discovery_override);
wpa_s->dpp_discovery_override = NULL;
os_free(wpa_s->dpp_groups_override);
wpa_s->dpp_groups_override = NULL;
os_free(wpa_s->dpp_devices_override);
wpa_s->dpp_devices_override = NULL;
wpa_s->dpp_ignore_netaccesskey_mismatch = 0;
#endif /* CONFIG_TESTING_OPTIONS */
if (!wpa_s->dpp_init_done)
return;
eloop_cancel_timeout(wpas_dpp_reply_wait_timeout, wpa_s, NULL);
offchannel_send_action_done(wpa_s);
wpas_dpp_listen_stop(wpa_s);
dpp_bootstrap_del(wpa_s, 0);
dpp_configurator_del(wpa_s, 0);
dpp_auth_deinit(wpa_s->dpp_auth);
wpa_s->dpp_auth = NULL;
}