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WPS: Split wps_build_oob_dev_password() into parts

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This allows sharing of a function to build the attribute without
changing the OOB parameters.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-06-27 18:25:16 +03:00
parent 8a13732f83
commit 78e625f79a
2 changed files with 26 additions and 12 deletions
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35
src/wps/wps_attr_build.c
View file

@ -340,19 +340,34 @@ int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
#ifdef CONFIG_WPS_OOB
int wps_build_oob_dev_password(struct wpabuf *msg, struct wps_context *wps)
int wps_build_oob_dev_pw(struct wpabuf *msg, u16 dev_pw_id,
const struct wpabuf *pubkey, const u8 *dev_pw,
size_t dev_pw_len)
{
size_t hash_len;
const u8 *addr[1];
u8 pubkey_hash[WPS_HASH_LEN];
addr[0] = wpabuf_head(pubkey);
hash_len = wpabuf_len(pubkey);
sha256_vector(1, addr, &hash_len, pubkey_hash);
wpabuf_put_be16(msg, ATTR_OOB_DEVICE_PASSWORD);
wpabuf_put_be16(msg, WPS_OOB_PUBKEY_HASH_LEN + 2 + dev_pw_len);
wpabuf_put_data(msg, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
wpabuf_put_be16(msg, dev_pw_id);
wpabuf_put_data(msg, dev_pw, dev_pw_len);
return 0;
}
int wps_build_oob_dev_password(struct wpabuf *msg, struct wps_context *wps)
{
u8 dev_password_bin[WPS_OOB_DEVICE_PASSWORD_LEN];
wpa_printf(MSG_DEBUG, "WPS: * OOB Device Password");
addr[0] = wpabuf_head(wps->dh_pubkey);
hash_len = wpabuf_len(wps->dh_pubkey);
sha256_vector(1, addr, &hash_len, pubkey_hash);
if (os_get_random((u8 *) &wps->oob_dev_pw_id, sizeof(u16)) < 0) {
wpa_printf(MSG_ERROR, "WPS: device password id "
"generation error");
@ -367,19 +382,15 @@ int wps_build_oob_dev_password(struct wpabuf *msg, struct wps_context *wps)
return -1;
}
wpabuf_put_be16(msg, ATTR_OOB_DEVICE_PASSWORD);
wpabuf_put_be16(msg, WPS_OOB_DEVICE_PASSWORD_ATTR_LEN);
wpabuf_put_data(msg, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN);
wpabuf_put_be16(msg, wps->oob_dev_pw_id);
wpabuf_put_data(msg, dev_password_bin, WPS_OOB_DEVICE_PASSWORD_LEN);
wpa_snprintf_hex_uppercase(
wpabuf_put(wps->oob_conf.dev_password,
wpabuf_size(wps->oob_conf.dev_password)),
wpabuf_size(wps->oob_conf.dev_password),
dev_password_bin, WPS_OOB_DEVICE_PASSWORD_LEN);
return 0;
return wps_build_oob_dev_pw(msg, wps->oob_dev_pw_id, wps->dh_pubkey,
dev_password_bin,
WPS_OOB_DEVICE_PASSWORD_LEN);
}
#endif /* CONFIG_WPS_OOB */

3
src/wps/wps_i.h
View file

@ -255,6 +255,9 @@ int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg);
int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg);
int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg);
int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg);
int wps_build_oob_dev_pw(struct wpabuf *msg, u16 dev_pw_id,
const struct wpabuf *pubkey, const u8 *dev_pw,
size_t dev_pw_len);
int wps_build_oob_dev_password(struct wpabuf *msg, struct wps_context *wps);
struct wpabuf * wps_ie_encapsulate(struct wpabuf *data);