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WPS NFC: Process new style handover select

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The new WPS connection handover select includes Registrar public key
hash instead of credential. Use the new information to start
abbreviated WPS handshake instead of configuring a new network directly
from the old Credential-from-NFC design.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-04-02 18:30:58 +03:00 committed by Jouni Malinen
parent 068cdb1d98
commit fa4c2988ae
2 changed files with 110 additions and 17 deletions
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13
src/eap_peer/eap_wsc.c
View file

@ -210,6 +210,15 @@ static void * eap_wsc_init(struct eap_sm *sm)
cfg.pbc = 1;
}
pos = os_strstr(phase1, "dev_pw_id=");
if (pos) {
u16 id = atoi(pos + 10);
if (id == DEV_PW_NFC_CONNECTION_HANDOVER)
nfc = 1;
if (cfg.pin || id == DEV_PW_NFC_CONNECTION_HANDOVER)
cfg.dev_pw_id = id;
}
if (cfg.pin == NULL && !cfg.pbc && !nfc) {
wpa_printf(MSG_INFO, "EAP-WSC: PIN or PBC not set in phase1 "
"configuration data");
@ -217,10 +226,6 @@ static void * eap_wsc_init(struct eap_sm *sm)
return NULL;
}
pos = os_strstr(phase1, "dev_pw_id=");
if (pos && cfg.pin)
cfg.dev_pw_id = atoi(pos + 10);
pos = os_strstr(phase1, " pkhash=");
if (pos) {
size_t len;

114
wpa_supplicant/wps_supplicant.c
View file

@ -1120,13 +1120,18 @@ static int wpas_wps_start_dev_pw(struct wpa_supplicant *wpa_s, const u8 *bssid,
if (pin)
os_snprintf(val, sizeof(val), "\"pin=%s dev_pw_id=%u%s\"",
pin, dev_pw_id, hash);
else {
else if (pin == NULL && dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
os_snprintf(val, sizeof(val), "\"dev_pw_id=%u%s\"",
dev_pw_id, hash);
} else {
rpin = wps_generate_pin();
os_snprintf(val, sizeof(val), "\"pin=%08d dev_pw_id=%u%s\"",
rpin, dev_pw_id, hash);
}
if (wpa_config_set(ssid, "phase1", val, 0) < 0)
if (wpa_config_set(ssid, "phase1", val, 0) < 0) {
wpa_printf(MSG_DEBUG, "WPS: Failed to set phase1 '%s'", val);
return -1;
}
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,
@ -2106,15 +2111,23 @@ 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 (dev_pw == NULL) {
if (dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && dev_pw == NULL) {
dev_pw = wpa_s->conf->wps_nfc_dev_pw;
dev_pw_id = wpa_s->conf->wps_nfc_dev_pw_id;
}
if (wpa_s->conf->wps_nfc_dh_pubkey == NULL ||
wpa_s->conf->wps_nfc_dh_privkey == NULL ||
dev_pw == NULL)
wpa_s->conf->wps_nfc_dh_privkey == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Missing DH params - "
"cannot start NFC-triggered connection");
return -1;
}
if (dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && dev_pw == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Missing Device Password (id=%u) - "
"cannot start NFC-triggered connection", dev_pw_id);
return -1;
}
dh5_free(wps->dh_ctx);
wpabuf_free(wps->dh_pubkey);
@ -2127,6 +2140,7 @@ int wpas_wps_start_nfc(struct wpa_supplicant *wpa_s, const u8 *bssid,
wps->dh_pubkey = NULL;
wpabuf_free(wps->dh_privkey);
wps->dh_privkey = NULL;
wpa_printf(MSG_DEBUG, "WPS: Failed to get DH priv/pub key");
return -1;
}
wps->dh_ctx = dh5_init_fixed(wps->dh_privkey, wps->dh_pubkey);
@ -2135,13 +2149,18 @@ int wpas_wps_start_nfc(struct wpa_supplicant *wpa_s, const u8 *bssid,
wps->dh_pubkey = NULL;
wpabuf_free(wps->dh_privkey);
wps->dh_privkey = NULL;
wpa_printf(MSG_DEBUG, "WPS: Failed to initialize DH context");
return -1;
}
wpa_snprintf_hex_uppercase(pw, sizeof(pw),
wpabuf_head(dev_pw), wpabuf_len(dev_pw));
return wpas_wps_start_dev_pw(wpa_s, bssid, pw, p2p_group, dev_pw_id,
peer_pubkey_hash, ssid, ssid_len);
if (dev_pw) {
wpa_snprintf_hex_uppercase(pw, sizeof(pw),
wpabuf_head(dev_pw),
wpabuf_len(dev_pw));
}
return wpas_wps_start_dev_pw(wpa_s, bssid, dev_pw ? pw : NULL,
p2p_group, dev_pw_id, peer_pubkey_hash,
ssid, ssid_len);
}
@ -2354,17 +2373,86 @@ int wpas_wps_nfc_rx_handover_sel(struct wpa_supplicant *wpa_s,
const struct wpabuf *data)
{
struct wpabuf *wps;
int ret;
int ret = -1;
u16 wsc_len;
const u8 *pos;
struct wpabuf msg;
struct wps_parse_attr attr;
u16 dev_pw_id;
wps = ndef_parse_wifi(data);
if (wps == NULL)
return -1;
wpa_printf(MSG_DEBUG, "WPS: Received application/vnd.wfa.wsc "
"payload from NFC connection handover");
wpa_hexdump_buf_key(MSG_DEBUG, "WPS: NFC payload", wps);
ret = wpas_wps_nfc_tag_process(wpa_s, wps);
wpabuf_free(wps);
wpa_hexdump_buf(MSG_DEBUG, "WPS: NFC payload", wps);
if (wpabuf_len(wps) < 2) {
wpa_printf(MSG_DEBUG, "WPS: Too short Wi-Fi Handover Select "
"Message");
goto out;
}
pos = wpabuf_head(wps);
wsc_len = WPA_GET_BE16(pos);
if (wsc_len > wpabuf_len(wps) - 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid WSC attribute length (%u) "
"in Wi-Fi Handover Select Message", wsc_len);
goto out;
}
pos += 2;
wpa_hexdump(MSG_DEBUG,
"WPS: WSC attributes in Wi-Fi Handover Select Message",
pos, wsc_len);
if (wsc_len < wpabuf_len(wps) - 2) {
wpa_hexdump(MSG_DEBUG,
"WPS: Ignore extra data after WSC attributes",
pos + wsc_len, wpabuf_len(wps) - 2 - wsc_len);
}
wpabuf_set(&msg, pos, wsc_len);
ret = wps_parse_msg(&msg, &attr);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "WPS: Could not parse WSC attributes in "
"Wi-Fi Handover Select Message");
goto out;
}
if (attr.oob_dev_password == NULL ||
attr.oob_dev_password_len < WPS_OOB_PUBKEY_HASH_LEN + 2) {
wpa_printf(MSG_DEBUG, "WPS: No Out-of-Band Device Password "
"included in Wi-Fi Handover Select Message");
ret = -1;
goto out;
}
if (attr.ssid == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No SSID included in Wi-Fi Handover "
"Select Message");
ret = -1;
goto out;
}
wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", attr.ssid, attr.ssid_len);
wpa_hexdump(MSG_DEBUG, "WPS: Out-of-Band Device Password",
attr.oob_dev_password, attr.oob_dev_password_len);
dev_pw_id = WPA_GET_BE16(attr.oob_dev_password +
WPS_OOB_PUBKEY_HASH_LEN);
if (dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER) {
wpa_printf(MSG_DEBUG, "WPS: Unexpected OOB Device Password ID "
"%u in Wi-Fi Handover Select Message", dev_pw_id);
ret = -1;
goto out;
}
wpa_hexdump(MSG_DEBUG, "WPS: AP Public Key hash",
attr.oob_dev_password, WPS_OOB_PUBKEY_HASH_LEN);
ret = wpas_wps_start_nfc(wpa_s, NULL, NULL, dev_pw_id, 0,
attr.oob_dev_password,
attr.ssid, attr.ssid_len);
out:
wpabuf_free(wps);
return ret;
}