static struct wpabuf * wps_build_m5(struct wps_data *wps)
{
struct wpabuf *msg, *plain;
wpa_printf(MSG_DEBUG, "WPS: Building Message M5");
plain = wpabuf_alloc(200);
if (plain == NULL)
return NULL;
msg = wpabuf_alloc(1000);
if (msg == NULL) {
wpabuf_free(plain);
return NULL;
}
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M5) ||
wps_build_registrar_nonce(wps, msg) ||
wps_build_e_snonce1(wps, plain) ||
wps_build_key_wrap_auth(wps, plain) ||
wps_build_encr_settings(wps, msg, plain) ||
wps_build_wfa_ext(msg, 0, NULL, 0) ||
wps_build_authenticator(wps, msg)) {
wpabuf_free(plain);
wpabuf_free(msg);
return NULL;
}
wpabuf_free(plain);
wps->state = RECV_M6;
return msg;
}
static struct wpabuf * wps_build_m7(struct wps_data *wps)
{
struct wpabuf *msg, *plain;
wpa_printf(MSG_DEBUG, "WPS: Building Message M7");
plain = wpabuf_alloc(500 + wps->wps->ap_settings_len);
if (plain == NULL)
return NULL;
msg = wpabuf_alloc(1000 + wps->wps->ap_settings_len);
if (msg == NULL) {
wpabuf_free(plain);
return NULL;
}
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M7) ||
wps_build_registrar_nonce(wps, msg) ||
wps_build_e_snonce2(wps, plain) ||
(wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
wps_build_key_wrap_auth(wps, plain) ||
wps_build_encr_settings(wps, msg, plain) ||
wps_build_authenticator(wps, msg)) {
wpabuf_free(plain);
wpabuf_free(msg);
return NULL;
}
wpabuf_free(plain);
wps->state = RECV_M8;
return msg;
}
static struct wpabuf * wps_build_m3(struct wps_data *wps)
{
struct wpabuf *msg;
wpa_printf(MSG_DEBUG, "WPS: Building Message M3");
if (wps->dev_password == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No Device Password available");
return NULL;
}
wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
msg = wpabuf_alloc(1000);
if (msg == NULL)
return NULL;
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M3) ||
wps_build_registrar_nonce(wps, msg) ||
wps_build_e_hash(wps, msg) ||
wps_build_wfa_ext(msg, 0, NULL, 0) ||
wps_build_authenticator(wps, msg)) {
wpabuf_free(msg);
return NULL;
}
wps->state = RECV_M4;
return msg;
}
static struct wpabuf * wps_build_m7(struct wps_data *wps)
{
struct wpabuf *msg, *plain;
wpa_printf(MSG_DEBUG, "WPS: Building Message M7");
plain = wpabuf_alloc(500 + wps->wps->ap_settings_len);
if (plain == NULL)
return NULL;
msg = wpabuf_alloc(1000 + wps->wps->ap_settings_len);
if (msg == NULL) {
wpabuf_free(plain);
return NULL;
}
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M7) ||
wps_build_registrar_nonce(wps, msg) ||
wps_build_e_snonce2(wps, plain) ||
(wps->wps->ap && wps_build_ap_settings(wps, plain)) ||
wps_build_key_wrap_auth(wps, plain) ||
wps_build_encr_settings(wps, msg, plain) ||
wps_build_wfa_ext(msg, 0, NULL, 0) ||
wps_build_authenticator(wps, msg)) {
wpabuf_free(plain);
wpabuf_free(msg);
return NULL;
}
wpabuf_free(plain);
if (wps->wps->ap && wps->wps->registrar) {
/*
* If the Registrar is only learning our current configuration,
* it may not continue protocol run to successful completion.
* Store information here to make sure it remains available.
*/
wps_device_store(wps->wps->registrar, &wps->peer_dev,
wps->uuid_r);
}
wps->state = RECV_M8;
return msg;
}
static struct wpabuf * wps_build_m3(struct wps_data *wps)
{
struct wpabuf *msg;
wpa_printf(MSG_DEBUG, "WPS: Building Message M3");
if (wps->dev_password == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No Device Password available");
return NULL;
}
if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0)
return NULL;
if (wps->wps->ap && random_pool_ready() != 1) {
wpa_printf(MSG_INFO,
"WPS: Not enough entropy in random pool to proceed - do not allow AP PIN to be used");
return NULL;
}
msg = wpabuf_alloc(1000);
if (msg == NULL)
return NULL;
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M3) ||
wps_build_registrar_nonce(wps, msg) ||
wps_build_e_hash(wps, msg) ||
wps_build_wfa_ext(msg, 0, NULL, 0) ||
wps_build_authenticator(wps, msg)) {
wpabuf_free(msg);
return NULL;
}
wps->state = RECV_M4;
return msg;
}