From: Michael Braun <michael-dev@xxxxxxxxxxxxx>
This enables using FT RRB without configuring each other AP locally.
Instead, broadcast messages are exchanged.
Signed-off-by: Michael Braun <michael-dev@xxxxxxxxxxxxx>
---
hostapd/hostapd.conf | 4 ++++
src/ap/wpa_auth.h | 3 +++
src/ap/wpa_auth_ft.c | 47 ++++++++++++++++++++++++++++++++++++++++-------
src/ap/wpa_auth_glue.c | 9 +++++++--
4 files changed, 54 insertions(+), 9 deletions(-)
diff --git a/hostapd/hostapd.conf b/hostapd/hostapd.conf
index dab4a4e..26546de 100644
--- a/hostapd/hostapd.conf
+++ b/hostapd/hostapd.conf
@@ -1306,6 +1306,8 @@ own_ip_addr=127.0.0.1
#r0kh=02:01:02:03:04:05 r0kh-1.example.com 000102030405060708090a0b0c0d0e0f
#r0kh=02:01:02:03:04:06 r0kh-2.example.com 00112233445566778899aabbccddeeff
# And so on.. One line per R0KH.
+# Wildcard entry:
+#r0kh=ff:ff:ff:ff:ff:ff * 00112233445566778899aabbccddeeff
# List of R1KHs in the same Mobility Domain
# format: <MAC address> <R1KH-ID> <128-bit key as hex string>
@@ -1315,6 +1317,8 @@ own_ip_addr=127.0.0.1
#r1kh=02:01:02:03:04:05 02:11:22:33:44:55 000102030405060708090a0b0c0d0e0f
#r1kh=02:01:02:03:04:06 02:11:22:33:44:66 00112233445566778899aabbccddeeff
# And so on.. One line per R1KH.
+# Wildcard entry:
+#r1kh=00:00:00:00:00:00 00:00:00:00:00:00 00112233445566778899aabbccddeeff
# Whether PMK-R1 push is enabled at R0KH
# 0 = do not push PMK-R1 to all configured R1KHs (default)
diff --git a/src/ap/wpa_auth.h b/src/ap/wpa_auth.h
index 5712884..39a1afd 100644
--- a/src/ap/wpa_auth.h
+++ b/src/ap/wpa_auth.h
@@ -44,6 +44,7 @@ struct ft_rrb_frame {
#define FT_R0KH_R1KH_PULL_NONCE_LEN 16
#define FT_R0KH_R1KH_PULL_DATA_LEN (FT_R0KH_R1KH_PULL_NONCE_LEN + \
+ FT_R0KH_ID_MAX_LEN + 1 + \
WPA_PMK_NAME_LEN + FT_R1KH_ID_LEN + \
ETH_ALEN)
#define FT_R0KH_R1KH_PULL_PAD_LEN ((8 - FT_R0KH_R1KH_PULL_DATA_LEN % 8) % 8)
@@ -55,6 +56,8 @@ struct ft_r0kh_r1kh_pull_frame {
u8 ap_address[ETH_ALEN];
u8 nonce[FT_R0KH_R1KH_PULL_NONCE_LEN];
+ u8 r0kh_id[FT_R0KH_ID_MAX_LEN];
+ u8 r0kh_id_len;
u8 pmk_r0_name[WPA_PMK_NAME_LEN];
u8 r1kh_id[FT_R1KH_ID_LEN];
u8 s1kh_id[ETH_ALEN];
diff --git a/src/ap/wpa_auth_ft.c b/src/ap/wpa_auth_ft.c
index e0e0740..04e9bf8 100644
--- a/src/ap/wpa_auth_ft.c
+++ b/src/ap/wpa_auth_ft.c
@@ -316,7 +316,7 @@ static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
const u8 *ies, size_t ies_len,
const u8 *pmk_r0_name)
{
- struct ft_remote_r0kh *r0kh;
+ struct ft_remote_r0kh *r0kh, *r0kh_wildcard = NULL;
struct ft_r0kh_r1kh_pull_frame frame, f;
r0kh = sm->wpa_auth->conf.r0kh_list;
@@ -325,8 +325,14 @@ static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
os_memcmp_const(r0kh->id, sm->r0kh_id, sm->r0kh_id_len) ==
0)
break;
+ if (r0kh->id_len == 1 && r0kh->id[0] == '*')
+ r0kh_wildcard = r0kh;
r0kh = r0kh->next;
}
+ if (r0kh == NULL && r0kh_wildcard != NULL) {
+ wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
+ r0kh = r0kh_wildcard;
+ }
if (r0kh == NULL) {
wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
sm->r0kh_id, sm->r0kh_id_len);
@@ -351,6 +357,8 @@ static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
}
os_memcpy(sm->ft_pending_pull_nonce, f.nonce,
FT_R0KH_R1KH_PULL_NONCE_LEN);
+ os_memcpy(f.r0kh_id, sm->r0kh_id, FT_R0KH_ID_MAX_LEN);
+ f.r0kh_id_len = sm->r0kh_id_len;
os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
os_memcpy(f.r1kh_id, sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
os_memcpy(f.s1kh_id, sm->addr, ETH_ALEN);
@@ -1423,7 +1431,7 @@ static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
struct ft_r0kh_r1kh_pull_frame f;
const u8 *crypt;
u8 *plain;
- struct ft_remote_r1kh *r1kh;
+ struct ft_remote_r1kh *r1kh, *r1kh_wildcard = NULL;
struct ft_r0kh_r1kh_resp_frame resp, r;
u8 pmk_r0[PMK_LEN];
int pairwise;
@@ -1437,8 +1445,15 @@ static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
while (r1kh) {
if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
break;
+ if (is_zero_ether_addr(r1kh->addr) &&
+ is_zero_ether_addr(r1kh->id))
+ r1kh_wildcard = r1kh;
r1kh = r1kh->next;
}
+ if (r1kh == NULL && r1kh_wildcard != NULL) {
+ wpa_printf(MSG_DEBUG, "FT: Using wildcard R1KH-ID");
+ r1kh = r1kh_wildcard;
+ }
if (r1kh == NULL) {
wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
"PMK-R1 pull source address " MACSTR,
@@ -1459,6 +1474,11 @@ static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
return -1;
}
+ if (f.r0kh_id_len != wpa_auth->conf.r0_key_holder_len ||
+ os_memcmp_const(f.r0kh_id, wpa_auth->conf.r0_key_holder,
+ f.r0kh_id_len) != 0)
+ return -1;
+
wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
f.nonce, sizeof(f.nonce));
wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
@@ -1559,7 +1579,7 @@ static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
struct ft_r0kh_r1kh_resp_frame f;
const u8 *crypt;
u8 *plain;
- struct ft_remote_r0kh *r0kh;
+ struct ft_remote_r0kh *r0kh, *r0kh_wildcard = NULL;
int pairwise, res;
wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
@@ -1571,8 +1591,14 @@ static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
while (r0kh) {
if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
break;
+ if (r0kh->id_len == 1 && r0kh->id[0] == '*')
+ r0kh_wildcard = r0kh;
r0kh = r0kh->next;
}
+ if (r0kh == NULL && r0kh_wildcard != NULL) {
+ wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
+ r0kh = r0kh_wildcard;
+ }
if (r0kh == NULL) {
wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
"PMK-R0 pull response source address " MACSTR,
@@ -1628,7 +1654,7 @@ static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
struct ft_r0kh_r1kh_push_frame f;
const u8 *crypt;
u8 *plain;
- struct ft_remote_r0kh *r0kh;
+ struct ft_remote_r0kh *r0kh, *r0kh_wildcard = NULL;
struct os_time now;
os_time_t tsend;
int pairwise;
@@ -1642,8 +1668,14 @@ static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
while (r0kh) {
if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
break;
+ if (r0kh->id_len == 1 && r0kh->id[0] == '*')
+ r0kh_wildcard = r0kh;
r0kh = r0kh->next;
}
+ if (r0kh == NULL && r0kh_wildcard != NULL) {
+ wpa_printf(MSG_DEBUG, "FT: Using wildcard R0KH-ID");
+ r0kh = r0kh_wildcard;
+ }
if (r0kh == NULL) {
wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
"PMK-R0 push source address " MACSTR,
@@ -1892,10 +1924,11 @@ void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
"for STA " MACSTR, MAC2STR(addr));
- r1kh = wpa_auth->conf.r1kh_list;
- while (r1kh) {
+ for (r1kh = wpa_auth->conf.r1kh_list; r1kh; r1kh = r1kh->next) {
+ if (is_zero_ether_addr(r1kh->addr) ||
+ is_zero_ether_addr(r1kh->id))
+ continue;
wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
- r1kh = r1kh->next;
}
}
diff --git a/src/ap/wpa_auth_glue.c b/src/ap/wpa_auth_glue.c
index 2a5a940..12b9ccc 100644
--- a/src/ap/wpa_auth_glue.c
+++ b/src/ap/wpa_auth_glue.c
@@ -417,6 +417,9 @@ static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx)
struct wpa_auth_ft_iface_iter_data *idata = ctx;
struct hostapd_data *hapd;
size_t j;
+ int multicast;
+
+ multicast = is_multicast_ether_addr(idata->dst);
for (j = 0; j < iface->num_bss; j++) {
hapd = iface->bss[j];
@@ -424,7 +427,8 @@ static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx)
continue;
if (!hapd->wpa_auth)
continue;
- if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) {
+ if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0 ||
+ multicast) {
wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to "
"locally managed BSS " MACSTR "@%s -> "
MACSTR "@%s",
@@ -434,7 +438,8 @@ static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx)
wpa_ft_rrb_rx(hapd->wpa_auth,
idata->src_hapd->own_addr,
idata->data, idata->data_len);
- return 1;
+ if (!multicast)
+ return 1;
}
}
--
2.1.4
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