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WPS: Share a single function for generating NFS password tokens

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There is no need for both hostapd and wpa_supplicant to have their
own functions for this.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-06-28 20:54:53 +03:00
parent 40a5e3bfde
commit bfc62fe133
4 changed files with 62 additions and 89 deletions
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48
src/ap/wps_hostapd.c
View file

@ -1626,50 +1626,10 @@ struct wpabuf * hostapd_wps_nfc_config_token(struct hostapd_data *hapd,
struct wpabuf * hostapd_wps_nfc_token_gen(struct hostapd_data *hapd, int ndef)
{
struct wpabuf *priv = NULL, *pub = NULL, *pw;
void *dh_ctx;
struct wpabuf *ret;
u16 val;
pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN);
if (pw == NULL)
return NULL;
if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN),
WPS_OOB_DEVICE_PASSWORD_LEN) ||
random_get_bytes((u8 *) &val, sizeof(val))) {
wpabuf_free(pw);
return NULL;
}
dh_ctx = dh5_init(&priv, &pub);
if (dh_ctx == NULL) {
wpabuf_free(pw);
return NULL;
}
dh5_free(dh_ctx);
hapd->conf->wps_nfc_dev_pw_id = 0x10 + val % 0xfff0;
wpabuf_free(hapd->conf->wps_nfc_dh_pubkey);
hapd->conf->wps_nfc_dh_pubkey = pub;
wpabuf_free(hapd->conf->wps_nfc_dh_privkey);
hapd->conf->wps_nfc_dh_privkey = priv;
wpabuf_free(hapd->conf->wps_nfc_dev_pw);
hapd->conf->wps_nfc_dev_pw = pw;
ret = wps_build_nfc_pw_token(hapd->conf->wps_nfc_dev_pw_id,
hapd->conf->wps_nfc_dh_pubkey,
hapd->conf->wps_nfc_dev_pw);
if (ndef && ret) {
struct wpabuf *tmp;
tmp = ndef_build_wifi(ret);
wpabuf_free(ret);
if (tmp == NULL)
return NULL;
ret = tmp;
}
return ret;
return wps_nfc_token_gen(ndef, &hapd->conf->wps_nfc_dev_pw_id,
&hapd->conf->wps_nfc_dh_pubkey,
&hapd->conf->wps_nfc_dh_privkey,
&hapd->conf->wps_nfc_dev_pw);
}

3
src/wps/wps.h
View file

@ -850,6 +850,9 @@ u16 wps_config_methods_str2bin(const char *str);
struct wpabuf * wps_build_nfc_pw_token(u16 dev_pw_id,
const struct wpabuf *pubkey,
const struct wpabuf *dev_pw);
struct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey,
struct wpabuf **privkey,
struct wpabuf **dev_pw);
/* ndef.c */
struct wpabuf * ndef_parse_wifi(const struct wpabuf *buf);

52
src/wps/wps_common.c
View file

@ -1,6 +1,6 @@
/*
* Wi-Fi Protected Setup - common functionality
* Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
* 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.
@ -727,3 +727,53 @@ struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
return msg;
}
#ifdef CONFIG_WPS_NFC
struct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey,
struct wpabuf **privkey,
struct wpabuf **dev_pw)
{
struct wpabuf *priv = NULL, *pub = NULL, *pw, *ret;
void *dh_ctx;
u16 val;
pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN);
if (pw == NULL)
return NULL;
if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN),
WPS_OOB_DEVICE_PASSWORD_LEN) ||
random_get_bytes((u8 *) &val, sizeof(val))) {
wpabuf_free(pw);
return NULL;
}
dh_ctx = dh5_init(&priv, &pub);
if (dh_ctx == NULL) {
wpabuf_free(pw);
return NULL;
}
dh5_free(dh_ctx);
*id = 0x10 + val % 0xfff0;
wpabuf_free(*pubkey);
*pubkey = pub;
wpabuf_free(*privkey);
*privkey = priv;
wpabuf_free(*dev_pw);
*dev_pw = pw;
ret = wps_build_nfc_pw_token(*id, *pubkey, *dev_pw);
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 */

48
wpa_supplicant/wps_supplicant.c
View file

@ -1796,50 +1796,10 @@ void wpas_wps_update_config(struct wpa_supplicant *wpa_s)
struct wpabuf * wpas_wps_nfc_token(struct wpa_supplicant *wpa_s, int ndef)
{
struct wpabuf *priv = NULL, *pub = NULL, *pw;
void *dh_ctx;
struct wpabuf *ret;
u16 val;
pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN);
if (pw == NULL)
return NULL;
if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN),
WPS_OOB_DEVICE_PASSWORD_LEN) ||
random_get_bytes((u8 *) &val, sizeof(val))) {
wpabuf_free(pw);
return NULL;
}
dh_ctx = dh5_init(&priv, &pub);
if (dh_ctx == NULL) {
wpabuf_free(pw);
return NULL;
}
dh5_free(dh_ctx);
wpa_s->conf->wps_nfc_dev_pw_id = 0x10 + val % 0xfff0;
wpabuf_free(wpa_s->conf->wps_nfc_dh_pubkey);
wpa_s->conf->wps_nfc_dh_pubkey = pub;
wpabuf_free(wpa_s->conf->wps_nfc_dh_privkey);
wpa_s->conf->wps_nfc_dh_privkey = priv;
wpabuf_free(wpa_s->conf->wps_nfc_dev_pw);
wpa_s->conf->wps_nfc_dev_pw = pw;
ret = wps_build_nfc_pw_token(wpa_s->conf->wps_nfc_dev_pw_id,
wpa_s->conf->wps_nfc_dh_pubkey,
wpa_s->conf->wps_nfc_dev_pw);
if (ndef && ret) {
struct wpabuf *tmp;
tmp = ndef_build_wifi(ret);
wpabuf_free(ret);
if (tmp == NULL)
return NULL;
ret = tmp;
}
return ret;
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);
}