static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
const unsigned char *src_addr,
const struct wpa_eapol_key *key,
int extra_len, u16 ver)
{
u16 key_info, keydatalen;
int rekey, ret;
struct wpa_gtk_data gd;
os_memset(&gd, 0, sizeof(gd));
key_info = WPA_GET_BE16(key->key_info);
keydatalen = WPA_GET_BE16(key->key_data_length);
if (sm->proto == WPA_PROTO_RSN)
{
ret = wpa_supplicant_process_1_of_2_rsn(sm, (const u8 *)(key + 1), keydatalen, key_info, &gd);
}
else
{
ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen, key_info, extra_len, ver, &gd);
}
if (ret)
return;
if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
return;
MSG_SET_WPA_SH();
return;
}
static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
const unsigned char *src_addr,
const struct wpa_eapol_key *key,
int extra_len, u16 ver)
{
u16 key_info, keydatalen;
int rekey, ret;
struct wpa_gtk_data gd;
os_memset(&gd, 0, sizeof(gd));
rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
wpa_printf(MSG_DEBUG, "WPA: RX message 1 of Group Key Handshake from "
MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
key_info = WPA_GET_BE16(key->key_info);
keydatalen = WPA_GET_BE16(key->key_data_length);
if (sm->proto == WPA_PROTO_RSN) {
ret = wpa_supplicant_process_1_of_2_rsn(sm,
(const u8 *) (key + 1),
keydatalen, key_info,
&gd);
} else {
ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
key_info, extra_len,
ver, &gd);
}
wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
if (ret)
goto failed;
if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
goto failed;
if (rekey) {
wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
"completed with " MACSTR " [GTK=%s]",
MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
wpa_sm_cancel_auth_timeout(sm);
wpa_sm_set_state(sm, WPA_COMPLETED);
} else {
wpa_supplicant_key_neg_complete(sm, sm->bssid,
key_info &
WPA_KEY_INFO_SECURE);
}
return;
failed:
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
}
static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
const struct wpa_eapol_key *key,
const u8 *gtk, size_t gtk_len,
int key_info)
{
#ifndef CONFIG_NO_WPA2
struct wpa_gtk_data gd;
/*
* IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
* GTK KDE format:
* KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
* Reserved [bits 0-7]
* GTK
*/
os_memset(&gd, 0, sizeof(gd));
wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
gtk, gtk_len);
if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
return -1;
gd.keyidx = gtk[0] & 0x3;
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
!!(gtk[0] & BIT(2)));
gtk += 2;
gtk_len -= 2;
os_memcpy(gd.gtk, gtk, gtk_len);
gd.gtk_len = gtk_len;
if (wpa_supplicant_check_group_cipher(sm->group_cipher,
gtk_len, gtk_len,
&gd.key_rsc_len, &gd.alg) ||
wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
wpa_printf(MSG_DEBUG, "RSN: Failed to install GTK");
return -1;
}
wpa_supplicant_key_neg_complete(sm, sm->bssid,
key_info & WPA_KEY_INFO_SECURE);
return 0;
#else /* CONFIG_NO_WPA2 */
return -1;
#endif /* CONFIG_NO_WPA2 */
}
static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
const struct wpa_eapol_key *key,
const u8 *gtk, size_t gtk_len,
int key_info)
{
struct wpa_gtk_data gd;
/*
* IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
* GTK KDE format:
* KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
* Reserved [bits 0-7]
* GTK
*/
//printf("wpa_supplicant_pairwise_gtk\n");
printf("gk\n");
os_memset(&gd, 0, sizeof(gd));
wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake", gtk, gtk_len);
if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
return -1;
gd.keyidx = gtk[0] & 0x3;
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm, !!(gtk[0] & BIT(2)));
gtk += 2;
gtk_len -= 2;
os_memcpy(gd.gtk, gtk, gtk_len);
gd.gtk_len = gtk_len;
if (wpa_supplicant_check_group_cipher(sm->group_cipher, gtk_len, gtk_len, &gd.key_rsc_len, &gd.alg)
|| wpa_supplicant_install_gtk(sm, &gd, key->key_rsc))
{
printf("RSN: Failed to install GTK\n");
return -1;
}
return 0;
}
