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fragattacks/wpa_supplicant/wps_supplicant.c
Jouni Malinen cae2119c86 P2P: Leave forced BSSID parameter for P2P group 
P2P group is only going to use a single GO, so we can leave the fixed
BSSID parameter set for the actual data connection in addition to the
initial WPS provisionign step. This can speed up operations with drivers
that select BSS internally by allowing them to skip an extra scan when
the BSSID and frequency of the GO is already known.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-07-25 16:18:12 +03:00

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/*
* wpa_supplicant / WPS integration
* Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "uuid.h"
#include "crypto/random.h"
#include "crypto/dh_group5.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/wpa_common.h"
#include "common/wpa_ctrl.h"
#include "eap_common/eap_wsc_common.h"
#include "eap_peer/eap.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "wps/wps_attr_parse.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "notify.h"
#include "blacklist.h"
#include "bss.h"
#include "scan.h"
#include "ap.h"
#include "p2p/p2p.h"
#include "p2p_supplicant.h"
#include "wps_supplicant.h"
#ifndef WPS_PIN_SCAN_IGNORE_SEL_REG
#define WPS_PIN_SCAN_IGNORE_SEL_REG 3
#endif /* WPS_PIN_SCAN_IGNORE_SEL_REG */
static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->wps_success &&
wpa_s->current_ssid &&
eap_is_wps_pin_enrollee(&wpa_s->current_ssid->eap)) {
const u8 *bssid = wpa_s->bssid;
if (is_zero_ether_addr(bssid))
bssid = wpa_s->pending_bssid;
wpa_printf(MSG_DEBUG, "WPS: PIN registration with " MACSTR
" did not succeed - continue trying to find "
"suitable AP", MAC2STR(bssid));
wpa_blacklist_add(wpa_s, bssid);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s,
wpa_s->blacklist_cleared ? 5 : 0, 0);
wpa_s->blacklist_cleared = 0;
return 1;
}
eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && !wpa_s->wps_success)
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL);
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
!(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
int disabled = wpa_s->current_ssid->disabled;
unsigned int freq = wpa_s->assoc_freq;
wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
"try to associate with the received credential "
"(freq=%u)", freq);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
if (disabled) {
wpa_printf(MSG_DEBUG, "WPS: Current network is "
"disabled - wait for user to enable");
return 1;
}
wpa_s->after_wps = 5;
wpa_s->wps_freq = freq;
wpa_s->normal_scans = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 1;
}
if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid) {
wpa_printf(MSG_DEBUG, "WPS: Registration completed - waiting "
"for external credential processing");
wpas_clear_wps(wpa_s);
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
return 1;
}
return 0;
}
static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
const struct wps_credential *cred)
{
struct wpa_driver_capa capa;
struct wpa_bss *bss;
const u8 *ie;
struct wpa_ie_data adv;
int wpa2 = 0, ccmp = 0;
/*
* Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
* case they are configured for mixed mode operation (WPA+WPA2 and
* TKIP+CCMP). Try to use scan results to figure out whether the AP
* actually supports stronger security and select that if the client
* has support for it, too.
*/
if (wpa_drv_get_capa(wpa_s, &capa))
return; /* Unknown what driver supports */
if (ssid->ssid == NULL)
return;
bss = wpa_bss_get(wpa_s, cred->mac_addr, ssid->ssid, ssid->ssid_len);
if (bss == NULL) {
wpa_printf(MSG_DEBUG, "WPS: The AP was not found from BSS "
"table - use credential as-is");
return;
}
wpa_printf(MSG_DEBUG, "WPS: AP found from BSS table");
ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
wpa2 = 1;
if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
ccmp = 1;
} else {
ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
adv.pairwise_cipher & WPA_CIPHER_CCMP)
ccmp = 1;
}
if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
(ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
/*
* TODO: This could be the initial AP configuration and the
* Beacon contents could change shortly. Should request a new
* scan and delay addition of the network until the updated
* scan results are available.
*/
wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
"support - use credential as-is");
return;
}
if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
(ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
(capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
"based on scan results");
if (wpa_s->conf->ap_scan == 1)
ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
else
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
}
if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
(ssid->proto & WPA_PROTO_WPA) &&
(capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
"based on scan results");
if (wpa_s->conf->ap_scan == 1)
ssid->proto |= WPA_PROTO_RSN;
else
ssid->proto = WPA_PROTO_RSN;
}
}
static int wpa_supplicant_wps_cred(void *ctx,
const struct wps_credential *cred)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *ssid = wpa_s->current_ssid;
u8 key_idx = 0;
u16 auth_type;
#ifdef CONFIG_WPS_REG_DISABLE_OPEN
int registrar = 0;
#endif /* CONFIG_WPS_REG_DISABLE_OPEN */
if ((wpa_s->conf->wps_cred_processing == 1 ||
wpa_s->conf->wps_cred_processing == 2) && cred->cred_attr) {
size_t blen = cred->cred_attr_len * 2 + 1;
char *buf = os_malloc(blen);
if (buf) {
wpa_snprintf_hex(buf, blen,
cred->cred_attr, cred->cred_attr_len);
wpa_msg(wpa_s, MSG_INFO, "%s%s",
WPS_EVENT_CRED_RECEIVED, buf);
os_free(buf);
}
wpas_notify_wps_credential(wpa_s, cred);
} else
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
cred->cred_attr, cred->cred_attr_len);
if (wpa_s->conf->wps_cred_processing == 1)
return 0;
wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
cred->auth_type);
wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
cred->key, cred->key_len);
wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
MAC2STR(cred->mac_addr));
auth_type = cred->auth_type;
if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
wpa_printf(MSG_DEBUG, "WPS: Workaround - convert mixed-mode "
"auth_type into WPA2PSK");
auth_type = WPS_AUTH_WPA2PSK;
}
if (auth_type != WPS_AUTH_OPEN &&
auth_type != WPS_AUTH_SHARED &&
auth_type != WPS_AUTH_WPAPSK &&
auth_type != WPS_AUTH_WPA2PSK) {
wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
"unsupported authentication type 0x%x",
auth_type);
return 0;
}
if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
"on the received credential");
#ifdef CONFIG_WPS_REG_DISABLE_OPEN
if (ssid->eap.identity &&
ssid->eap.identity_len == WSC_ID_REGISTRAR_LEN &&
os_memcmp(ssid->eap.identity, WSC_ID_REGISTRAR,
WSC_ID_REGISTRAR_LEN) == 0)
registrar = 1;
#endif /* CONFIG_WPS_REG_DISABLE_OPEN */
os_free(ssid->eap.identity);
ssid->eap.identity = NULL;
ssid->eap.identity_len = 0;
os_free(ssid->eap.phase1);
ssid->eap.phase1 = NULL;
os_free(ssid->eap.eap_methods);
ssid->eap.eap_methods = NULL;
if (!ssid->p2p_group) {
ssid->temporary = 0;
ssid->bssid_set = 0;
}
} else {
wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
"received credential");
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
wpas_notify_network_added(wpa_s, ssid);
}
wpa_config_set_network_defaults(ssid);
os_free(ssid->ssid);
ssid->ssid = os_malloc(cred->ssid_len);
if (ssid->ssid) {
os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
ssid->ssid_len = cred->ssid_len;
}
switch (cred->encr_type) {
case WPS_ENCR_NONE:
break;
case WPS_ENCR_WEP:
if (cred->key_len <= 0)
break;
if (cred->key_len != 5 && cred->key_len != 13 &&
cred->key_len != 10 && cred->key_len != 26) {
wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key length "
"%lu", (unsigned long) cred->key_len);
return -1;
}
if (cred->key_idx > NUM_WEP_KEYS) {
wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key index %d",
cred->key_idx);
return -1;
}
if (cred->key_idx)
key_idx = cred->key_idx - 1;
if (cred->key_len == 10 || cred->key_len == 26) {
if (hexstr2bin((char *) cred->key,
ssid->wep_key[key_idx],
cred->key_len / 2) < 0) {
wpa_printf(MSG_ERROR, "WPS: Invalid WEP Key "
"%d", key_idx);
return -1;
}
ssid->wep_key_len[key_idx] = cred->key_len / 2;
} else {
os_memcpy(ssid->wep_key[key_idx], cred->key,
cred->key_len);
ssid->wep_key_len[key_idx] = cred->key_len;
}
ssid->wep_tx_keyidx = key_idx;
break;
case WPS_ENCR_TKIP:
ssid->pairwise_cipher = WPA_CIPHER_TKIP;
break;
case WPS_ENCR_AES:
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
break;
}
switch (auth_type) {
case WPS_AUTH_OPEN:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_NONE;
ssid->proto = 0;
#ifdef CONFIG_WPS_REG_DISABLE_OPEN
if (registrar) {
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OPEN_NETWORK
"id=%d - Credentials for an open "
"network disabled by default - use "
"'select_network %d' to enable",
ssid->id, ssid->id);
ssid->disabled = 1;
}
#endif /* CONFIG_WPS_REG_DISABLE_OPEN */
break;
case WPS_AUTH_SHARED:
ssid->auth_alg = WPA_AUTH_ALG_SHARED;
ssid->key_mgmt = WPA_KEY_MGMT_NONE;
ssid->proto = 0;
break;
case WPS_AUTH_WPAPSK:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->proto = WPA_PROTO_WPA;
break;
case WPS_AUTH_WPA:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
ssid->proto = WPA_PROTO_WPA;
break;
case WPS_AUTH_WPA2:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
ssid->proto = WPA_PROTO_RSN;
break;
case WPS_AUTH_WPA2PSK:
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->proto = WPA_PROTO_RSN;
break;
}
if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
if (cred->key_len == 2 * PMK_LEN) {
if (hexstr2bin((const char *) cred->key, ssid->psk,
PMK_LEN)) {
wpa_printf(MSG_ERROR, "WPS: Invalid Network "
"Key");
return -1;
}
ssid->psk_set = 1;
ssid->export_keys = 1;
} else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
os_free(ssid->passphrase);
ssid->passphrase = os_malloc(cred->key_len + 1);
if (ssid->passphrase == NULL)
return -1;
os_memcpy(ssid->passphrase, cred->key, cred->key_len);
ssid->passphrase[cred->key_len] = '\0';
wpa_config_update_psk(ssid);
ssid->export_keys = 1;
} else {
wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
"length %lu",
(unsigned long) cred->key_len);
return -1;
}
}
wpas_wps_security_workaround(wpa_s, ssid, cred);
#ifndef CONFIG_NO_CONFIG_WRITE
if (wpa_s->conf->update_config &&
wpa_config_write(wpa_s->confname, wpa_s->conf)) {
wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
return -1;
}
#endif /* CONFIG_NO_CONFIG_WRITE */
return 0;
}
#ifdef CONFIG_P2P
static void wpas_wps_pbc_overlap_cb(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpas_p2p_notif_pbc_overlap(wpa_s);
}
#endif /* CONFIG_P2P */
static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
struct wps_event_m2d *m2d)
{
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
"dev_password_id=%d config_error=%d",
m2d->dev_password_id, m2d->config_error);
wpas_notify_wps_event_m2d(wpa_s, m2d);
#ifdef CONFIG_P2P
if (wpa_s->parent && wpa_s->parent != wpa_s) {
wpa_msg(wpa_s->parent, MSG_INFO, WPS_EVENT_M2D
"dev_password_id=%d config_error=%d",
m2d->dev_password_id, m2d->config_error);
}
if (m2d->config_error == WPS_CFG_MULTIPLE_PBC_DETECTED) {
/*
* Notify P2P from eloop timeout to avoid issues with the
* interface getting removed while processing a message.
*/
eloop_register_timeout(0, 0, wpas_wps_pbc_overlap_cb, wpa_s,
NULL);
}
#endif /* CONFIG_P2P */
}
static const char * wps_event_fail_reason[NUM_WPS_EI_VALUES] = {
"No Error", /* WPS_EI_NO_ERROR */
"TKIP Only Prohibited", /* WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED */
"WEP Prohibited" /* WPS_EI_SECURITY_WEP_PROHIBITED */
};
static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
struct wps_event_fail *fail)
{
if (fail->error_indication > 0 &&
fail->error_indication < NUM_WPS_EI_VALUES) {
wpa_msg(wpa_s, MSG_INFO,
WPS_EVENT_FAIL "msg=%d config_error=%d reason=%d (%s)",
fail->msg, fail->config_error, fail->error_indication,
wps_event_fail_reason[fail->error_indication]);
if (wpa_s->parent && wpa_s->parent != wpa_s)
wpa_msg(wpa_s->parent, MSG_INFO, WPS_EVENT_FAIL
"msg=%d config_error=%d reason=%d (%s)",
fail->msg, fail->config_error,
fail->error_indication,
wps_event_fail_reason[fail->error_indication]);
} else {
wpa_msg(wpa_s, MSG_INFO,
WPS_EVENT_FAIL "msg=%d config_error=%d",
fail->msg, fail->config_error);
if (wpa_s->parent && wpa_s->parent != wpa_s)
wpa_msg(wpa_s->parent, MSG_INFO, WPS_EVENT_FAIL
"msg=%d config_error=%d",
fail->msg, fail->config_error);
}
wpas_clear_wps(wpa_s);
wpas_notify_wps_event_fail(wpa_s, fail);
#ifdef CONFIG_P2P
wpas_p2p_wps_failed(wpa_s, fail);
#endif /* CONFIG_P2P */
}
static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
{
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
wpa_s->wps_success = 1;
wpas_notify_wps_event_success(wpa_s);
#ifdef CONFIG_P2P
wpas_p2p_wps_success(wpa_s, wpa_s->bssid, 0);
#endif /* CONFIG_P2P */
}
static void wpa_supplicant_wps_event_er_ap_add(struct wpa_supplicant *wpa_s,
struct wps_event_er_ap *ap)
{
char uuid_str[100];
char dev_type[WPS_DEV_TYPE_BUFSIZE];
uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
if (ap->pri_dev_type)
wps_dev_type_bin2str(ap->pri_dev_type, dev_type,
sizeof(dev_type));
else
dev_type[0] = '\0';
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_ADD "%s " MACSTR
" pri_dev_type=%s wps_state=%d |%s|%s|%s|%s|%s|%s|",
uuid_str, MAC2STR(ap->mac_addr), dev_type, ap->wps_state,
ap->friendly_name ? ap->friendly_name : "",
ap->manufacturer ? ap->manufacturer : "",
ap->model_description ? ap->model_description : "",
ap->model_name ? ap->model_name : "",
ap->manufacturer_url ? ap->manufacturer_url : "",
ap->model_url ? ap->model_url : "");
}
static void wpa_supplicant_wps_event_er_ap_remove(struct wpa_supplicant *wpa_s,
struct wps_event_er_ap *ap)
{
char uuid_str[100];
uuid_bin2str(ap->uuid, uuid_str, sizeof(uuid_str));
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_REMOVE "%s", uuid_str);
}
static void wpa_supplicant_wps_event_er_enrollee_add(
struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
{
char uuid_str[100];
char dev_type[WPS_DEV_TYPE_BUFSIZE];
uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
if (enrollee->pri_dev_type)
wps_dev_type_bin2str(enrollee->pri_dev_type, dev_type,
sizeof(dev_type));
else
dev_type[0] = '\0';
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_ADD "%s " MACSTR
" M1=%d config_methods=0x%x dev_passwd_id=%d pri_dev_type=%s "
"|%s|%s|%s|%s|%s|",
uuid_str, MAC2STR(enrollee->mac_addr), enrollee->m1_received,
enrollee->config_methods, enrollee->dev_passwd_id, dev_type,
enrollee->dev_name ? enrollee->dev_name : "",
enrollee->manufacturer ? enrollee->manufacturer : "",
enrollee->model_name ? enrollee->model_name : "",
enrollee->model_number ? enrollee->model_number : "",
enrollee->serial_number ? enrollee->serial_number : "");
}
static void wpa_supplicant_wps_event_er_enrollee_remove(
struct wpa_supplicant *wpa_s, struct wps_event_er_enrollee *enrollee)
{
char uuid_str[100];
uuid_bin2str(enrollee->uuid, uuid_str, sizeof(uuid_str));
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_ENROLLEE_REMOVE "%s " MACSTR,
uuid_str, MAC2STR(enrollee->mac_addr));
}
static void wpa_supplicant_wps_event_er_ap_settings(
struct wpa_supplicant *wpa_s,
struct wps_event_er_ap_settings *ap_settings)
{
char uuid_str[100];
char key_str[65];
const struct wps_credential *cred = ap_settings->cred;
key_str[0] = '\0';
if (cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
if (cred->key_len >= 8 && cred->key_len <= 64) {
os_memcpy(key_str, cred->key, cred->key_len);
key_str[cred->key_len] = '\0';
}
}
uuid_bin2str(ap_settings->uuid, uuid_str, sizeof(uuid_str));
/* Use wpa_msg_ctrl to avoid showing the key in debug log */
wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_ER_AP_SETTINGS
"uuid=%s ssid=%s auth_type=0x%04x encr_type=0x%04x "
"key=%s",
uuid_str, wpa_ssid_txt(cred->ssid, cred->ssid_len),
cred->auth_type, cred->encr_type, key_str);
}
static void wpa_supplicant_wps_event_er_set_sel_reg(
struct wpa_supplicant *wpa_s,
struct wps_event_er_set_selected_registrar *ev)
{
char uuid_str[100];
uuid_bin2str(ev->uuid, uuid_str, sizeof(uuid_str));
switch (ev->state) {
case WPS_ER_SET_SEL_REG_START:
wpa_msg(wpa_s, MSG_DEBUG, WPS_EVENT_ER_SET_SEL_REG
"uuid=%s state=START sel_reg=%d dev_passwd_id=%u "
"sel_reg_config_methods=0x%x",
uuid_str, ev->sel_reg, ev->dev_passwd_id,
ev->sel_reg_config_methods);
break;
case WPS_ER_SET_SEL_REG_DONE:
wpa_msg(wpa_s, MSG_DEBUG, WPS_EVENT_ER_SET_SEL_REG
"uuid=%s state=DONE", uuid_str);
break;
case WPS_ER_SET_SEL_REG_FAILED:
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_ER_SET_SEL_REG
"uuid=%s state=FAILED", uuid_str);
break;
}
}
static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
union wps_event_data *data)
{
struct wpa_supplicant *wpa_s = ctx;
switch (event) {
case WPS_EV_M2D:
wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
break;
case WPS_EV_FAIL:
wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
break;
case WPS_EV_SUCCESS:
wpa_supplicant_wps_event_success(wpa_s);
break;
case WPS_EV_PWD_AUTH_FAIL:
#ifdef CONFIG_AP
if (wpa_s->ap_iface && data->pwd_auth_fail.enrollee)
wpa_supplicant_ap_pwd_auth_fail(wpa_s);
#endif /* CONFIG_AP */
break;
case WPS_EV_PBC_OVERLAP:
break;
case WPS_EV_PBC_TIMEOUT:
break;
case WPS_EV_ER_AP_ADD:
wpa_supplicant_wps_event_er_ap_add(wpa_s, &data->ap);
break;
case WPS_EV_ER_AP_REMOVE:
wpa_supplicant_wps_event_er_ap_remove(wpa_s, &data->ap);
break;
case WPS_EV_ER_ENROLLEE_ADD:
wpa_supplicant_wps_event_er_enrollee_add(wpa_s,
&data->enrollee);
break;
case WPS_EV_ER_ENROLLEE_REMOVE:
wpa_supplicant_wps_event_er_enrollee_remove(wpa_s,
&data->enrollee);
break;
case WPS_EV_ER_AP_SETTINGS:
wpa_supplicant_wps_event_er_ap_settings(wpa_s,
&data->ap_settings);
break;
case WPS_EV_ER_SET_SELECTED_REGISTRAR:
wpa_supplicant_wps_event_er_set_sel_reg(wpa_s,
&data->set_sel_reg);
break;
case WPS_EV_AP_PIN_SUCCESS:
break;
}
}
enum wps_request_type wpas_wps_get_req_type(struct wpa_ssid *ssid)
{
if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
eap_is_wps_pin_enrollee(&ssid->eap))
return WPS_REQ_ENROLLEE;
else
return WPS_REQ_REGISTRAR;
}
static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
{
int id;
struct wpa_ssid *ssid, *remove_ssid = NULL, *prev_current;
prev_current = wpa_s->current_ssid;
eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
/* Remove any existing WPS network from configuration */
ssid = wpa_s->conf->ssid;
while (ssid) {
if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
if (ssid == wpa_s->current_ssid) {
wpa_s->current_ssid = NULL;
if (ssid != NULL)
wpas_notify_network_changed(wpa_s);
}
id = ssid->id;
remove_ssid = ssid;
} else
id = -1;
ssid = ssid->next;
if (id >= 0) {
if (prev_current == remove_ssid) {
wpa_sm_set_config(wpa_s->wpa, NULL);
eapol_sm_notify_config(wpa_s->eapol, NULL,
NULL);
}
wpas_notify_network_removed(wpa_s, remove_ssid);
wpa_config_remove_network(wpa_s->conf, id);
}
}
}
static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_TIMEOUT "Requested operation timed "
"out");
wpas_clear_wps(wpa_s);
}
static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
int registrar, const u8 *bssid)
{
struct wpa_ssid *ssid;
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return NULL;
wpas_notify_network_added(wpa_s, ssid);
wpa_config_set_network_defaults(ssid);
ssid->temporary = 1;
if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
wpa_config_set(ssid, "identity", registrar ?
"\"" WSC_ID_REGISTRAR "\"" :
"\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
return NULL;
}
if (bssid) {
#ifndef CONFIG_P2P
struct wpa_bss *bss;
int count = 0;
#endif /* CONFIG_P2P */
os_memcpy(ssid->bssid, bssid, ETH_ALEN);
ssid->bssid_set = 1;
/*
* Note: With P2P, the SSID may change at the time the WPS
* provisioning is started, so better not filter the AP based
* on the current SSID in the scan results.
*/
#ifndef CONFIG_P2P
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (os_memcmp(bssid, bss->bssid, ETH_ALEN) != 0)
continue;
os_free(ssid->ssid);
ssid->ssid = os_malloc(bss->ssid_len);
if (ssid->ssid == NULL)
break;
os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
ssid->ssid_len = bss->ssid_len;
wpa_hexdump_ascii(MSG_DEBUG, "WPS: Picked SSID from "
"scan results",
ssid->ssid, ssid->ssid_len);
count++;
}
if (count > 1) {
wpa_printf(MSG_DEBUG, "WPS: More than one SSID found "
"for the AP; use wildcard");
os_free(ssid->ssid);
ssid->ssid = NULL;
ssid->ssid_len = 0;
}
#endif /* CONFIG_P2P */
}
return ssid;
}
static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
struct wpa_ssid *selected, const u8 *bssid)
{
struct wpa_ssid *ssid;
struct wpa_bss *bss;
wpa_s->known_wps_freq = 0;
if (bssid) {
bss = wpa_bss_get_bssid(wpa_s, bssid);
if (bss && bss->freq > 0) {
wpa_s->known_wps_freq = 1;
wpa_s->wps_freq = bss->freq;
}
}
if (wpa_s->current_ssid)
wpa_supplicant_deauthenticate(
wpa_s, WLAN_REASON_DEAUTH_LEAVING);
/* Mark all other networks disabled and trigger reassociation */
ssid = wpa_s->conf->ssid;
while (ssid) {
int was_disabled = ssid->disabled;
/*
* In case the network object corresponds to a persistent group
* then do not send out network disabled signal. In addition,
* do not change disabled status of persistent network objects
* from 2 to 1 should we connect to another network.
*/
if (was_disabled != 2) {
ssid->disabled = ssid != selected;
if (was_disabled != ssid->disabled)
wpas_notify_network_enabled_changed(wpa_s,
ssid);
}
ssid = ssid->next;
}
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_s->scan_runs = 0;
wpa_s->normal_scans = 0;
wpa_s->wps_success = 0;
wpa_s->blacklist_cleared = 0;
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid,
int p2p_group)
{
struct wpa_ssid *ssid;
wpas_clear_wps(wpa_s);
ssid = wpas_wps_add_network(wpa_s, 0, bssid);
if (ssid == NULL)
return -1;
ssid->temporary = 1;
ssid->p2p_group = p2p_group;
#ifdef CONFIG_P2P
if (p2p_group && wpa_s->go_params && wpa_s->go_params->ssid_len) {
ssid->ssid = os_zalloc(wpa_s->go_params->ssid_len + 1);
if (ssid->ssid) {
ssid->ssid_len = wpa_s->go_params->ssid_len;
os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
ssid->ssid_len);
wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
"SSID", ssid->ssid, ssid->ssid_len);
}
}
#endif /* CONFIG_P2P */
wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
if (wpa_s->wps_fragment_size)
ssid->eap.fragment_size = wpa_s->wps_fragment_size;
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
wpa_s, NULL);
wpas_wps_reassoc(wpa_s, ssid, bssid);
return 0;
}
int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
const char *pin, int p2p_group, u16 dev_pw_id)
{
struct wpa_ssid *ssid;
char val[128];
unsigned int rpin = 0;
wpas_clear_wps(wpa_s);
ssid = wpas_wps_add_network(wpa_s, 0, bssid);
if (ssid == NULL)
return -1;
ssid->temporary = 1;
ssid->p2p_group = p2p_group;
#ifdef CONFIG_P2P
if (p2p_group && wpa_s->go_params && wpa_s->go_params->ssid_len) {
ssid->ssid = os_zalloc(wpa_s->go_params->ssid_len + 1);
if (ssid->ssid) {
ssid->ssid_len = wpa_s->go_params->ssid_len;
os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
ssid->ssid_len);
wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
"SSID", ssid->ssid, ssid->ssid_len);
}
}
#endif /* CONFIG_P2P */
if (pin)
os_snprintf(val, sizeof(val), "\"pin=%s dev_pw_id=%u\"",
pin, dev_pw_id);
else {
rpin = wps_generate_pin();
os_snprintf(val, sizeof(val), "\"pin=%08d dev_pw_id=%u\"",
rpin, dev_pw_id);
}
wpa_config_set(ssid, "phase1", val, 0);
if (wpa_s->wps_fragment_size)
ssid->eap.fragment_size = wpa_s->wps_fragment_size;
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
wpa_s, NULL);
wpas_wps_reassoc(wpa_s, ssid, bssid);
return rpin;
}
/* Cancel the wps pbc/pin requests */
int wpas_wps_cancel(struct wpa_supplicant *wpa_s)
{
#ifdef CONFIG_AP
if (wpa_s->ap_iface) {
wpa_printf(MSG_DEBUG, "WPS: Cancelling in AP mode");
return wpa_supplicant_ap_wps_cancel(wpa_s);
}
#endif /* CONFIG_AP */
if (wpa_s->wpa_state == WPA_SCANNING ||
wpa_s->wpa_state == WPA_DISCONNECTED) {
wpa_printf(MSG_DEBUG, "WPS: Cancel operation - cancel scan");
wpa_supplicant_cancel_scan(wpa_s);
wpas_clear_wps(wpa_s);
} else if (wpa_s->wpa_state >= WPA_ASSOCIATED) {
wpa_printf(MSG_DEBUG, "WPS: Cancel operation - "
"deauthenticate");
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
wpas_clear_wps(wpa_s);
}
return 0;
}
#ifdef CONFIG_WPS_OOB
int wpas_wps_start_oob(struct wpa_supplicant *wpa_s, char *device_type,
char *path, char *method, char *name)
{
struct wps_context *wps = wpa_s->wps;
struct oob_device_data *oob_dev;
oob_dev = wps_get_oob_device(device_type);
if (oob_dev == NULL)
return -1;
oob_dev->device_path = path;
oob_dev->device_name = name;
wps->oob_conf.oob_method = wps_get_oob_method(method);
if (wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E) {
/*
* Use pre-configured DH keys in order to be able to write the
* key hash into the OOB file.
*/
wpabuf_free(wps->dh_pubkey);
wpabuf_free(wps->dh_privkey);
wps->dh_privkey = NULL;
wps->dh_pubkey = NULL;
dh5_free(wps->dh_ctx);
wps->dh_ctx = dh5_init(&wps->dh_privkey, &wps->dh_pubkey);
wps->dh_pubkey = wpabuf_zeropad(wps->dh_pubkey, 192);
if (wps->dh_ctx == NULL || wps->dh_pubkey == NULL) {
wpa_printf(MSG_ERROR, "WPS: Failed to initialize "
"Diffie-Hellman handshake");
return -1;
}
}
if (wps->oob_conf.oob_method == OOB_METHOD_CRED)
wpas_clear_wps(wpa_s);
if (wps_process_oob(wps, oob_dev, 0) < 0)
return -1;
if ((wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_E ||
wps->oob_conf.oob_method == OOB_METHOD_DEV_PWD_R) &&
wpas_wps_start_pin(wpa_s, NULL,
wpabuf_head(wps->oob_conf.dev_password), 0,
DEV_PW_DEFAULT) < 0)
return -1;
return 0;
}
#endif /* CONFIG_WPS_OOB */
int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
const char *pin, struct wps_new_ap_settings *settings)
{
struct wpa_ssid *ssid;
char val[200];
char *pos, *end;
int res;
if (!pin)
return -1;
wpas_clear_wps(wpa_s);
ssid = wpas_wps_add_network(wpa_s, 1, bssid);
if (ssid == NULL)
return -1;
ssid->temporary = 1;
pos = val;
end = pos + sizeof(val);
res = os_snprintf(pos, end - pos, "\"pin=%s", pin);
if (res < 0 || res >= end - pos)
return -1;
pos += res;
if (settings) {
res = os_snprintf(pos, end - pos, " new_ssid=%s new_auth=%s "
"new_encr=%s new_key=%s",
settings->ssid_hex, settings->auth,
settings->encr, settings->key_hex);
if (res < 0 || res >= end - pos)
return -1;
pos += res;
}
res = os_snprintf(pos, end - pos, "\"");
if (res < 0 || res >= end - pos)
return -1;
wpa_config_set(ssid, "phase1", val, 0);
if (wpa_s->wps_fragment_size)
ssid->eap.fragment_size = wpa_s->wps_fragment_size;
eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
wpa_s, NULL);
wpas_wps_reassoc(wpa_s, ssid, bssid);
return 0;
}
static int wpas_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
size_t psk_len)
{
wpa_printf(MSG_DEBUG, "WPS: Received new WPA/WPA2-PSK from WPS for "
"STA " MACSTR, MAC2STR(mac_addr));
wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
/* TODO */
return 0;
}
static void wpas_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
const struct wps_device_data *dev)
{
char uuid[40], txt[400];
int len;
char devtype[WPS_DEV_TYPE_BUFSIZE];
if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
return;
wpa_printf(MSG_DEBUG, "WPS: PIN needed for UUID-E %s", uuid);
len = os_snprintf(txt, sizeof(txt), "WPS-EVENT-PIN-NEEDED %s " MACSTR
" [%s|%s|%s|%s|%s|%s]",
uuid, MAC2STR(dev->mac_addr), dev->device_name,
dev->manufacturer, dev->model_name,
dev->model_number, dev->serial_number,
wps_dev_type_bin2str(dev->pri_dev_type, devtype,
sizeof(devtype)));
if (len > 0 && len < (int) sizeof(txt))
wpa_printf(MSG_INFO, "%s", txt);
}
static void wpas_wps_set_sel_reg_cb(void *ctx, int sel_reg, u16 dev_passwd_id,
u16 sel_reg_config_methods)
{
#ifdef CONFIG_WPS_ER
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->wps_er == NULL)
return;
wpa_printf(MSG_DEBUG, "WPS ER: SetSelectedRegistrar - sel_reg=%d "
"dev_password_id=%u sel_reg_config_methods=0x%x",
sel_reg, dev_passwd_id, sel_reg_config_methods);
wps_er_set_sel_reg(wpa_s->wps_er, sel_reg, dev_passwd_id,
sel_reg_config_methods);
#endif /* CONFIG_WPS_ER */
}
static u16 wps_fix_config_methods(u16 config_methods)
{
#ifdef CONFIG_WPS2
if ((config_methods &
(WPS_CONFIG_DISPLAY | WPS_CONFIG_VIRT_DISPLAY |
WPS_CONFIG_PHY_DISPLAY)) == WPS_CONFIG_DISPLAY) {
wpa_printf(MSG_INFO, "WPS: Converting display to "
"virtual_display for WPS 2.0 compliance");
config_methods |= WPS_CONFIG_VIRT_DISPLAY;
}
if ((config_methods &
(WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_VIRT_PUSHBUTTON |
WPS_CONFIG_PHY_PUSHBUTTON)) == WPS_CONFIG_PUSHBUTTON) {
wpa_printf(MSG_INFO, "WPS: Converting push_button to "
"virtual_push_button for WPS 2.0 compliance");
config_methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
}
#endif /* CONFIG_WPS2 */
return config_methods;
}
static void wpas_wps_set_uuid(struct wpa_supplicant *wpa_s,
struct wps_context *wps)
{
wpa_printf(MSG_DEBUG, "WPS: Set UUID for interface %s", wpa_s->ifname);
if (is_nil_uuid(wpa_s->conf->uuid)) {
struct wpa_supplicant *first;
first = wpa_s->global->ifaces;
while (first && first->next)
first = first->next;
if (first && first != wpa_s) {
if (wps != wpa_s->global->ifaces->wps)
os_memcpy(wps->uuid,
wpa_s->global->ifaces->wps->uuid,
WPS_UUID_LEN);
wpa_hexdump(MSG_DEBUG, "WPS: UUID from the first "
"interface", wps->uuid, WPS_UUID_LEN);
} else {
uuid_gen_mac_addr(wpa_s->own_addr, wps->uuid);
wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
"address", wps->uuid, WPS_UUID_LEN);
}
} else {
os_memcpy(wps->uuid, wpa_s->conf->uuid, WPS_UUID_LEN);
wpa_hexdump(MSG_DEBUG, "WPS: UUID based on configuration",
wps->uuid, WPS_UUID_LEN);
}
}
static void wpas_wps_set_vendor_ext_m1(struct wpa_supplicant *wpa_s,
struct wps_context *wps)
{
wpabuf_free(wps->dev.vendor_ext_m1);
wps->dev.vendor_ext_m1 = NULL;
if (wpa_s->conf->wps_vendor_ext_m1) {
wps->dev.vendor_ext_m1 =
wpabuf_dup(wpa_s->conf->wps_vendor_ext_m1);
if (!wps->dev.vendor_ext_m1) {
wpa_printf(MSG_ERROR, "WPS: Cannot "
"allocate memory for vendor_ext_m1");
}
}
}
int wpas_wps_init(struct wpa_supplicant *wpa_s)
{
struct wps_context *wps;
struct wps_registrar_config rcfg;
struct hostapd_hw_modes *modes;
u16 m;
wps = os_zalloc(sizeof(*wps));
if (wps == NULL)
return -1;
wps->cred_cb = wpa_supplicant_wps_cred;
wps->event_cb = wpa_supplicant_wps_event;
wps->cb_ctx = wpa_s;
wps->dev.device_name = wpa_s->conf->device_name;
wps->dev.manufacturer = wpa_s->conf->manufacturer;
wps->dev.model_name = wpa_s->conf->model_name;
wps->dev.model_number = wpa_s->conf->model_number;
wps->dev.serial_number = wpa_s->conf->serial_number;
wps->config_methods =
wps_config_methods_str2bin(wpa_s->conf->config_methods);
if ((wps->config_methods & (WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
(WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
wpa_printf(MSG_ERROR, "WPS: Both Label and Display config "
"methods are not allowed at the same time");
os_free(wps);
return -1;
}
wps->config_methods = wps_fix_config_methods(wps->config_methods);
wps->dev.config_methods = wps->config_methods;
os_memcpy(wps->dev.pri_dev_type, wpa_s->conf->device_type,
WPS_DEV_TYPE_LEN);
wps->dev.num_sec_dev_types = wpa_s->conf->num_sec_device_types;
os_memcpy(wps->dev.sec_dev_type, wpa_s->conf->sec_device_type,
WPS_DEV_TYPE_LEN * wps->dev.num_sec_dev_types);
wpas_wps_set_vendor_ext_m1(wpa_s, wps);
wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
modes = wpa_s->hw.modes;
if (modes) {
for (m = 0; m < wpa_s->hw.num_modes; m++) {
if (modes[m].mode == HOSTAPD_MODE_IEEE80211B ||
modes[m].mode == HOSTAPD_MODE_IEEE80211G)
wps->dev.rf_bands |= WPS_RF_24GHZ;
else if (modes[m].mode == HOSTAPD_MODE_IEEE80211A)
wps->dev.rf_bands |= WPS_RF_50GHZ;
}
}
if (wps->dev.rf_bands == 0) {
/*
* Default to claiming support for both bands if the driver
* does not provide support for fetching supported bands.
*/
wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ;
}
os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
wpas_wps_set_uuid(wpa_s, wps);
wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
os_memset(&rcfg, 0, sizeof(rcfg));
rcfg.new_psk_cb = wpas_wps_new_psk_cb;
rcfg.pin_needed_cb = wpas_wps_pin_needed_cb;
rcfg.set_sel_reg_cb = wpas_wps_set_sel_reg_cb;
rcfg.cb_ctx = wpa_s;
wps->registrar = wps_registrar_init(wps, &rcfg);
if (wps->registrar == NULL) {
wpa_printf(MSG_DEBUG, "Failed to initialize WPS Registrar");
os_free(wps);
return -1;
}
wpa_s->wps = wps;
return 0;
}
void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
if (wpa_s->wps == NULL)
return;
#ifdef CONFIG_WPS_ER
wps_er_deinit(wpa_s->wps_er, NULL, NULL);
wpa_s->wps_er = NULL;
#endif /* CONFIG_WPS_ER */
wps_registrar_deinit(wpa_s->wps->registrar);
wpabuf_free(wpa_s->wps->dh_pubkey);
wpabuf_free(wpa_s->wps->dh_privkey);
wpabuf_free(wpa_s->wps->oob_conf.pubkey_hash);
wpabuf_free(wpa_s->wps->oob_conf.dev_password);
wpabuf_free(wpa_s->wps->dev.vendor_ext_m1);
os_free(wpa_s->wps->network_key);
os_free(wpa_s->wps);
wpa_s->wps = NULL;
}
int wpas_wps_ssid_bss_match(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid, struct wpa_scan_res *bss)
{
struct wpabuf *wps_ie;
if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
return -1;
wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
if (!wps_ie) {
wpa_printf(MSG_DEBUG, " skip - non-WPS AP");
return 0;
}
if (!wps_is_selected_pbc_registrar(wps_ie)) {
wpa_printf(MSG_DEBUG, " skip - WPS AP "
"without active PBC Registrar");
wpabuf_free(wps_ie);
return 0;
}
/* TODO: overlap detection */
wpa_printf(MSG_DEBUG, " selected based on WPS IE "
"(Active PBC)");
wpabuf_free(wps_ie);
return 1;
}
if (eap_is_wps_pin_enrollee(&ssid->eap)) {
if (!wps_ie) {
wpa_printf(MSG_DEBUG, " skip - non-WPS AP");
return 0;
}
/*
* Start with WPS APs that advertise our address as an
* authorized MAC (v2.0) or active PIN Registrar (v1.0) and
* allow any WPS AP after couple of scans since some APs do not
* set Selected Registrar attribute properly when using
* external Registrar.
*/
if (!wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1)) {
if (wpa_s->scan_runs < WPS_PIN_SCAN_IGNORE_SEL_REG) {
wpa_printf(MSG_DEBUG, " skip - WPS AP "
"without active PIN Registrar");
wpabuf_free(wps_ie);
return 0;
}
wpa_printf(MSG_DEBUG, " selected based on WPS IE");
} else {
wpa_printf(MSG_DEBUG, " selected based on WPS IE "
"(Authorized MAC or Active PIN)");
}
wpabuf_free(wps_ie);
return 1;
}
if (wps_ie) {
wpa_printf(MSG_DEBUG, " selected based on WPS IE");
wpabuf_free(wps_ie);
return 1;
}
return -1;
}
int wpas_wps_ssid_wildcard_ok(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
struct wpa_scan_res *bss)
{
struct wpabuf *wps_ie = NULL;
int ret = 0;
if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
/* allow wildcard SSID for WPS PBC */
ret = 1;
}
} else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (wps_ie &&
(wps_is_addr_authorized(wps_ie, wpa_s->own_addr, 1) ||
wpa_s->scan_runs >= WPS_PIN_SCAN_IGNORE_SEL_REG)) {
/* allow wildcard SSID for WPS PIN */
ret = 1;
}
}
if (!ret && ssid->bssid_set &&
os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
/* allow wildcard SSID due to hardcoded BSSID match */
ret = 1;
}
#ifdef CONFIG_WPS_STRICT
if (wps_ie) {
if (wps_validate_beacon_probe_resp(wps_ie, bss->beacon_ie_len >
0, bss->bssid) < 0)
ret = 0;
if (bss->beacon_ie_len) {
struct wpabuf *bcn_wps;
bcn_wps = wpa_scan_get_vendor_ie_multi_beacon(
bss, WPS_IE_VENDOR_TYPE);
if (bcn_wps == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Mandatory WPS IE "
"missing from AP Beacon");
ret = 0;
} else {
if (wps_validate_beacon(wps_ie) < 0)
ret = 0;
wpabuf_free(bcn_wps);
}
}
}
#endif /* CONFIG_WPS_STRICT */
wpabuf_free(wps_ie);
return ret;
}
int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected, struct wpa_ssid *ssid)
{
const u8 *sel_uuid, *uuid;
struct wpabuf *wps_ie;
int ret = 0;
struct wpa_bss *bss;
if (!eap_is_wps_pbc_enrollee(&ssid->eap))
return 0;
wpa_printf(MSG_DEBUG, "WPS: Check whether PBC session overlap is "
"present in scan results; selected BSSID " MACSTR,
MAC2STR(selected->bssid));
/* Make sure that only one AP is in active PBC mode */
wps_ie = wpa_bss_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
if (wps_ie) {
sel_uuid = wps_get_uuid_e(wps_ie);
wpa_hexdump(MSG_DEBUG, "WPS: UUID of the selected BSS",
sel_uuid, UUID_LEN);
} else {
wpa_printf(MSG_DEBUG, "WPS: Selected BSS does not include "
"WPS IE?!");
sel_uuid = NULL;
}
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
struct wpabuf *ie;
if (bss == selected)
continue;
ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (!ie)
continue;
if (!wps_is_selected_pbc_registrar(ie)) {
wpabuf_free(ie);
continue;
}
wpa_printf(MSG_DEBUG, "WPS: Another BSS in active PBC mode: "
MACSTR, MAC2STR(bss->bssid));
uuid = wps_get_uuid_e(ie);
wpa_hexdump(MSG_DEBUG, "WPS: UUID of the other BSS",
uuid, UUID_LEN);
if (sel_uuid == NULL || uuid == NULL ||
os_memcmp(sel_uuid, uuid, UUID_LEN) != 0) {
ret = 1; /* PBC overlap */
wpa_msg(wpa_s, MSG_INFO, "WPS: PBC overlap detected: "
MACSTR " and " MACSTR,
MAC2STR(selected->bssid),
MAC2STR(bss->bssid));
wpabuf_free(ie);
break;
}
/* TODO: verify that this is reasonable dual-band situation */
wpabuf_free(ie);
}
wpabuf_free(wps_ie);
return ret;
}
void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
unsigned int pbc = 0, auth = 0, pin = 0, wps = 0;
if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
return;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
struct wpabuf *ie;
ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (!ie)
continue;
if (wps_is_selected_pbc_registrar(ie))
pbc++;
else if (wps_is_addr_authorized(ie, wpa_s->own_addr, 0))
auth++;
else if (wps_is_selected_pin_registrar(ie))
pin++;
else
wps++;
wpabuf_free(ie);
}
if (pbc)
wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
else if (auth)
wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_AUTH);
else if (pin)
wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
else if (wps)
wpa_msg_ctrl(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
}
int wpas_wps_searching(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid;
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
return 1;
}
return 0;
}
int wpas_wps_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
char *end)
{
struct wpabuf *wps_ie;
int ret;
wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len, WPS_DEV_OUI_WFA);
if (wps_ie == NULL)
return 0;
ret = wps_attr_text(wps_ie, buf, end);
wpabuf_free(wps_ie);
return ret;
}
int wpas_wps_er_start(struct wpa_supplicant *wpa_s, const char *filter)
{
#ifdef CONFIG_WPS_ER
if (wpa_s->wps_er) {
wps_er_refresh(wpa_s->wps_er);
return 0;
}
wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname, filter);
if (wpa_s->wps_er == NULL)
return -1;
return 0;
#else /* CONFIG_WPS_ER */
return 0;
#endif /* CONFIG_WPS_ER */
}
int wpas_wps_er_stop(struct wpa_supplicant *wpa_s)
{
#ifdef CONFIG_WPS_ER
wps_er_deinit(wpa_s->wps_er, NULL, NULL);
wpa_s->wps_er = NULL;
#endif /* CONFIG_WPS_ER */
return 0;
}
#ifdef CONFIG_WPS_ER
int wpas_wps_er_add_pin(struct wpa_supplicant *wpa_s, const u8 *addr,
const char *uuid, const char *pin)
{
u8 u[UUID_LEN];
int any = 0;
if (os_strcmp(uuid, "any") == 0)
any = 1;
else if (uuid_str2bin(uuid, u))
return -1;
return wps_registrar_add_pin(wpa_s->wps->registrar, addr,
any ? NULL : u,
(const u8 *) pin, os_strlen(pin), 300);
}
int wpas_wps_er_pbc(struct wpa_supplicant *wpa_s, const char *uuid)
{
u8 u[UUID_LEN];
if (uuid_str2bin(uuid, u))
return -1;
return wps_er_pbc(wpa_s->wps_er, u);
}
int wpas_wps_er_learn(struct wpa_supplicant *wpa_s, const char *uuid,
const char *pin)
{
u8 u[UUID_LEN];
if (uuid_str2bin(uuid, u))
return -1;
return wps_er_learn(wpa_s->wps_er, u, (const u8 *) pin,
os_strlen(pin));
}
int wpas_wps_er_set_config(struct wpa_supplicant *wpa_s, const char *uuid,
int id)
{
u8 u[UUID_LEN];
struct wpa_ssid *ssid;
struct wps_credential cred;
if (uuid_str2bin(uuid, u))
return -1;
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL || ssid->ssid == NULL)
return -1;
os_memset(&cred, 0, sizeof(cred));
if (ssid->ssid_len > 32)
return -1;
os_memcpy(cred.ssid, ssid->ssid, ssid->ssid_len);
cred.ssid_len = ssid->ssid_len;
if (ssid->key_mgmt & WPA_KEY_MGMT_PSK) {
cred.auth_type = (ssid->proto & WPA_PROTO_RSN) ?
WPS_AUTH_WPA2PSK : WPS_AUTH_WPAPSK;
if (ssid->pairwise_cipher & WPA_CIPHER_CCMP)
cred.encr_type = WPS_ENCR_AES;
else
cred.encr_type = WPS_ENCR_TKIP;
if (ssid->passphrase) {
cred.key_len = os_strlen(ssid->passphrase);
if (cred.key_len >= 64)
return -1;
os_memcpy(cred.key, ssid->passphrase, cred.key_len);
} else if (ssid->psk_set) {
cred.key_len = 32;
os_memcpy(cred.key, ssid->psk, 32);
} else
return -1;
} else {
cred.auth_type = WPS_AUTH_OPEN;
cred.encr_type = WPS_ENCR_NONE;
}
return wps_er_set_config(wpa_s->wps_er, u, &cred);
}
int wpas_wps_er_config(struct wpa_supplicant *wpa_s, const char *uuid,
const char *pin, struct wps_new_ap_settings *settings)
{
u8 u[UUID_LEN];
struct wps_credential cred;
size_t len;
if (uuid_str2bin(uuid, u))
return -1;
if (settings->ssid_hex == NULL || settings->auth == NULL ||
settings->encr == NULL || settings->key_hex == NULL)
return -1;
os_memset(&cred, 0, sizeof(cred));
len = os_strlen(settings->ssid_hex);
if ((len & 1) || len > 2 * sizeof(cred.ssid) ||
hexstr2bin(settings->ssid_hex, cred.ssid, len / 2))
return -1;
cred.ssid_len = len / 2;
len = os_strlen(settings->key_hex);
if ((len & 1) || len > 2 * sizeof(cred.key) ||
hexstr2bin(settings->key_hex, cred.key, len / 2))
return -1;
cred.key_len = len / 2;
if (os_strcmp(settings->auth, "OPEN") == 0)
cred.auth_type = WPS_AUTH_OPEN;
else if (os_strcmp(settings->auth, "WPAPSK") == 0)
cred.auth_type = WPS_AUTH_WPAPSK;
else if (os_strcmp(settings->auth, "WPA2PSK") == 0)
cred.auth_type = WPS_AUTH_WPA2PSK;
else
return -1;
if (os_strcmp(settings->encr, "NONE") == 0)
cred.encr_type = WPS_ENCR_NONE;
else if (os_strcmp(settings->encr, "WEP") == 0)
cred.encr_type = WPS_ENCR_WEP;
else if (os_strcmp(settings->encr, "TKIP") == 0)
cred.encr_type = WPS_ENCR_TKIP;
else if (os_strcmp(settings->encr, "CCMP") == 0)
cred.encr_type = WPS_ENCR_AES;
else
return -1;
return wps_er_config(wpa_s->wps_er, u, (const u8 *) pin,
os_strlen(pin), &cred);
}
#ifdef CONFIG_WPS_NFC
struct wpabuf * wpas_wps_er_nfc_config_token(struct wpa_supplicant *wpa_s,
int ndef, const char *uuid)
{
struct wpabuf *ret;
u8 u[UUID_LEN];
if (!wpa_s->wps_er)
return NULL;
if (uuid_str2bin(uuid, u))
return NULL;
ret = wps_er_nfc_config_token(wpa_s->wps_er, u);
if (ndef && ret) {
struct wpabuf *tmp;
tmp = ndef_build_wifi(ret);
wpabuf_free(ret);
if (tmp == NULL)
return NULL;
ret = tmp;
}
return ret;
}
#endif /* CONFIG_WPS_NFC */
static int callbacks_pending = 0;
static void wpas_wps_terminate_cb(void *ctx)
{
wpa_printf(MSG_DEBUG, "WPS ER: Terminated");
if (--callbacks_pending <= 0)
eloop_terminate();
}
#endif /* CONFIG_WPS_ER */
int wpas_wps_terminate_pending(struct wpa_supplicant *wpa_s)
{
#ifdef CONFIG_WPS_ER
if (wpa_s->wps_er) {
callbacks_pending++;
wps_er_deinit(wpa_s->wps_er, wpas_wps_terminate_cb, wpa_s);
wpa_s->wps_er = NULL;
return 1;
}
#endif /* CONFIG_WPS_ER */
return 0;
}
int wpas_wps_in_progress(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid;
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (!ssid->disabled && ssid->key_mgmt == WPA_KEY_MGMT_WPS)
return 1;
}
return 0;
}
void wpas_wps_update_config(struct wpa_supplicant *wpa_s)
{
struct wps_context *wps = wpa_s->wps;
if (wps == NULL)
return;
if (wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS) {
wps->config_methods = wps_config_methods_str2bin(
wpa_s->conf->config_methods);
if ((wps->config_methods &
(WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) ==
(WPS_CONFIG_DISPLAY | WPS_CONFIG_LABEL)) {
wpa_printf(MSG_ERROR, "WPS: Both Label and Display "
"config methods are not allowed at the "
"same time");
wps->config_methods &= ~WPS_CONFIG_LABEL;
}
}
wps->config_methods = wps_fix_config_methods(wps->config_methods);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE)
os_memcpy(wps->dev.pri_dev_type, wpa_s->conf->device_type,
WPS_DEV_TYPE_LEN);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_SEC_DEVICE_TYPE) {
wps->dev.num_sec_dev_types = wpa_s->conf->num_sec_device_types;
os_memcpy(wps->dev.sec_dev_type, wpa_s->conf->sec_device_type,
wps->dev.num_sec_dev_types * WPS_DEV_TYPE_LEN);
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_VENDOR_EXTENSION)
wpas_wps_set_vendor_ext_m1(wpa_s, wps);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_OS_VERSION)
wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID)
wpas_wps_set_uuid(wpa_s, wps);
if (wpa_s->conf->changed_parameters &
(CFG_CHANGED_DEVICE_NAME | CFG_CHANGED_WPS_STRING)) {
/* Update pointers to make sure they refer current values */
wps->dev.device_name = wpa_s->conf->device_name;
wps->dev.manufacturer = wpa_s->conf->manufacturer;
wps->dev.model_name = wpa_s->conf->model_name;
wps->dev.model_number = wpa_s->conf->model_number;
wps->dev.serial_number = wpa_s->conf->serial_number;
}
}
#ifdef CONFIG_WPS_NFC
struct wpabuf * wpas_wps_nfc_token(struct wpa_supplicant *wpa_s, int ndef)
{
return wps_nfc_token_gen(ndef, &wpa_s->conf->wps_nfc_dev_pw_id,
&wpa_s->conf->wps_nfc_dh_pubkey,
&wpa_s->conf->wps_nfc_dh_privkey,
&wpa_s->conf->wps_nfc_dev_pw);
}
int wpas_wps_start_nfc(struct wpa_supplicant *wpa_s, const u8 *bssid)
{
struct wps_context *wps = wpa_s->wps;
char pw[32 * 2 + 1];
if (wpa_s->conf->wps_nfc_dh_pubkey == NULL ||
wpa_s->conf->wps_nfc_dh_privkey == NULL ||
wpa_s->conf->wps_nfc_dev_pw == NULL)
return -1;
dh5_free(wps->dh_ctx);
wpabuf_free(wps->dh_pubkey);
wpabuf_free(wps->dh_privkey);
wps->dh_privkey = wpabuf_dup(wpa_s->conf->wps_nfc_dh_privkey);
wps->dh_pubkey = wpabuf_dup(wpa_s->conf->wps_nfc_dh_pubkey);
if (wps->dh_privkey == NULL || wps->dh_pubkey == NULL) {
wps->dh_ctx = NULL;
wpabuf_free(wps->dh_pubkey);
wps->dh_pubkey = NULL;
wpabuf_free(wps->dh_privkey);
wps->dh_privkey = NULL;
return -1;
}
wps->dh_ctx = dh5_init_fixed(wps->dh_privkey, wps->dh_pubkey);
if (wps->dh_ctx == NULL)
return -1;
wpa_snprintf_hex_uppercase(pw, sizeof(pw),
wpabuf_head(wpa_s->conf->wps_nfc_dev_pw),
wpabuf_len(wpa_s->conf->wps_nfc_dev_pw));
return wpas_wps_start_pin(wpa_s, bssid, pw, 0,
wpa_s->conf->wps_nfc_dev_pw_id);
}
static int wpas_wps_use_cred(struct wpa_supplicant *wpa_s,
struct wps_parse_attr *attr)
{
if (wps_oob_use_cred(wpa_s->wps, attr) < 0)
return -1;
if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
return 0;
wpa_printf(MSG_DEBUG, "WPS: Request reconnection with new network "
"based on the received credential added");
wpa_s->normal_scans = 0;
wpa_supplicant_reinit_autoscan(wpa_s);
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
}
static int wpas_wps_add_nfc_password_token(struct wpa_supplicant *wpa_s,
struct wps_parse_attr *attr)
{
return wps_registrar_add_nfc_password_token(
wpa_s->wps->registrar, attr->oob_dev_password,
attr->oob_dev_password_len);
}
static int wpas_wps_nfc_tag_process(struct wpa_supplicant *wpa_s,
const struct wpabuf *wps)
{
struct wps_parse_attr attr;
wpa_hexdump_buf(MSG_DEBUG, "WPS: Received NFC tag payload", wps);
if (wps_parse_msg(wps, &attr)) {
wpa_printf(MSG_DEBUG, "WPS: Ignore invalid data from NFC tag");
return -1;
}
if (attr.num_cred)
return wpas_wps_use_cred(wpa_s, &attr);
#ifdef CONFIG_WPS_ER
if (attr.oob_dev_password)
return wpas_wps_add_nfc_password_token(wpa_s, &attr);
#endif /* CONFIG_WPS_ER */
wpa_printf(MSG_DEBUG, "WPS: Ignore unrecognized NFC tag");
return -1;
}
int wpas_wps_nfc_tag_read(struct wpa_supplicant *wpa_s,
const struct wpabuf *data)
{
const struct wpabuf *wps = data;
struct wpabuf *tmp = NULL;
int ret;
if (wpabuf_len(data) < 4)
return -1;
if (*wpabuf_head_u8(data) != 0x10) {
/* Assume this contains full NDEF record */
tmp = ndef_parse_wifi(data);
if (tmp == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Could not parse NDEF");
return -1;
}
wps = tmp;
}
ret = wpas_wps_nfc_tag_process(wpa_s, wps);
wpabuf_free(tmp);
return ret;
}
#endif /* CONFIG_WPS_NFC */
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