DGNum/hostapd
6
0
Fork 0
Code Issues Pull requests 1 Projects Releases Packages Wiki Activity Actions

WNM: Add WNM-Sleep Mode for station mode

Browse source 
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Xi Chen 2012-02-26 17:27:19 +02:00 • committed by Jouni Malinen
parent d32d94dbf4
commit 75cad1a0d4
6 changed files with 426 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

117
src/rsn_supp/wpa.c
View file

@ -2659,3 +2659,120 @@ void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
pmksa_cache_flush(sm->pmksa, network_ctx);
#endif /* CONFIG_NO_WPA2 */
}
#ifdef CONFIG_IEEE80211V
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
{
struct wpa_gtk_data gd;
#ifdef CONFIG_IEEE80211W
struct wpa_igtk_kde igd;
u16 keyidx;
#endif /* CONFIG_IEEE80211W */
u16 keyinfo;
u8 keylen; /* plaintext key len */
u8 keydatalen;
u8 *key_rsc;
os_memset(&gd, 0, sizeof(gd));
#ifdef CONFIG_IEEE80211W
os_memset(&igd, 0, sizeof(igd));
#endif /* CONFIG_IEEE80211W */
switch (sm->group_cipher) {
case WPA_CIPHER_CCMP:
keylen = 16;
gd.key_rsc_len = 6;
gd.alg = WPA_ALG_CCMP;
break;
case WPA_CIPHER_TKIP:
keylen = 32;
gd.key_rsc_len = 6;
gd.alg = WPA_ALG_TKIP;
break;
case WPA_CIPHER_WEP104:
keylen = 13;
gd.key_rsc_len = 0;
gd.alg = WPA_ALG_WEP;
break;
case WPA_CIPHER_WEP40:
keylen = 5;
gd.key_rsc_len = 0;
gd.alg = WPA_ALG_WEP;
break;
default:
wpa_printf(MSG_DEBUG, "Unsupported group cipher suite");
return -1;
}
if (subelem_id == WNM_SLEEP_SUBELEM_GTK) {
key_rsc = buf + 5;
keyinfo = WPA_GET_LE16(buf+2);
keydatalen = buf[1] - 11 - 8;
gd.gtk_len = keylen;
if (gd.gtk_len != buf[4]) {
wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d",
gd.gtk_len, buf[4]);
return -1;
}
gd.keyidx = keyinfo & 0x03; /* B0 - B1 */
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(
sm, !!(keyinfo & WPA_KEY_INFO_TXRX));
if (keydatalen % 8) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len "
"%d", keydatalen);
return -1;
}
if (aes_unwrap(sm->ptk.kek, keydatalen / 8, buf + 13, gd.gtk))
{
wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - "
"could not decrypt GTK");
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)",
gd.gtk, gd.gtk_len);
if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) {
wpa_printf(MSG_DEBUG, "Failed to install the GTK in "
"WNM mode");
return -1;
}
#ifdef CONFIG_IEEE80211W
} else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
if (buf[1] != 2 + 6 + WPA_IGTK_LEN + 8) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len "
"%d", buf[1] - 2 - 6 - 8);
return -1;
}
os_memcpy(igd.keyid, buf + 2, 2);
os_memcpy(igd.pn, buf + 4, 6);
keyidx = WPA_GET_LE16(igd.keyid);
if (aes_unwrap(sm->ptk.kek, WPA_IGTK_LEN / 8, buf + 10,
igd.igtk)) {
wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - "
"could not decrypr IGTK");
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)",
igd.igtk, WPA_IGTK_LEN);
if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
keyidx, 0, igd.pn, sizeof(igd.pn),
igd.igtk, WPA_IGTK_LEN) < 0) {
wpa_printf(MSG_DEBUG, "Failed to install the IGTK in "
"WNM mode");
return -1;
}
#endif /* CONFIG_IEEE80211W */
} else {
wpa_printf(MSG_DEBUG, "Unknown element id");
return -1;
}
return 0;
}
#endif /* CONFIG_IEEE80211V */

4
src/rsn_supp/wpa.h
View file

@ -366,4 +366,8 @@ void wpa_tdls_enable(struct wpa_sm *sm, int enabled);
void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_is_external_setup(struct wpa_sm *sm);
#ifdef CONFIG_IEEE80211V
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf);
#endif /* CONFIG_IEEE80211V */
#endif /* WPA_H */