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FT: Include identity and radius_cui in pull/resp frames

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This allows APs using FT to get the EAP session information from R0KH to
R1KHs.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
This commit is contained in:
Michael Braun 2017-05-18 15:21:54 +02:00 committed by Jouni Malinen
parent 9fbe292ff3
commit 069b4e3048
2 changed files with 195 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
src/ap/wpa_auth.h
View file

@ -84,6 +84,9 @@ struct ft_rrb_frame {
#define FT_RRB_VLAN_UNTAGGED 13 /* le16 */
#define FT_RRB_VLAN_TAGGED 14 /* n times le16 */
#define FT_RRB_IDENTITY 15
#define FT_RRB_RADIUS_CUI 16
struct ft_rrb_tlv {
le16 type;
le16 len;
@ -98,7 +101,7 @@ struct ft_rrb_seq {
/* session TLVs:
* required: PMK_R1, PMK_R1_NAME, PAIRWISE
* optional: VLAN_UNTAGGED, VLAN_TAGGED, EXPIRES_IN
* optional: VLAN_UNTAGGED, VLAN_TAGGED, EXPIRES_IN, IDENTITY, RADIUS_CUI
*
* pull frame TLVs:
* auth:

206
src/ap/wpa_auth_ft.c
View file

@ -325,6 +325,8 @@ static size_t wpa_ft_tlv_lin(const struct tlv_list *tlvs, u8 *start,
if (tlv_len + tlvs[i].len > (size_t) (endpos - start))
return tlv_len;
if (tlvs[i].len == 0)
continue;
tlv_len += tlvs[i].len;
os_memcpy(pos, tlvs[i].data, tlvs[i].len);
pos = start + tlv_len;
@ -645,6 +647,50 @@ static int wpa_ft_get_vlan(struct wpa_authenticator *wpa_auth,
}
static int
wpa_ft_set_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
const u8 *identity, size_t identity_len)
{
if (!wpa_auth->cb->set_identity)
return -1;
return wpa_auth->cb->set_identity(wpa_auth->cb_ctx, sta_addr, identity,
identity_len);
}
static size_t
wpa_ft_get_identity(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
const u8 **buf)
{
*buf = NULL;
if (!wpa_auth->cb->get_identity)
return 0;
return wpa_auth->cb->get_identity(wpa_auth->cb_ctx, sta_addr, buf);
}
static int
wpa_ft_set_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
const u8 *radius_cui, size_t radius_cui_len)
{
if (!wpa_auth->cb->set_radius_cui)
return -1;
return wpa_auth->cb->set_radius_cui(wpa_auth->cb_ctx, sta_addr,
radius_cui, radius_cui_len);
}
static size_t
wpa_ft_get_radius_cui(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
const u8 **buf)
{
*buf = NULL;
if (!wpa_auth->cb->get_radius_cui)
return 0;
return wpa_auth->cb->get_radius_cui(wpa_auth->cb_ctx, sta_addr, buf);
}
static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
const u8 *sta_addr,
u8 *tspec_ie, size_t tspec_ielen)
@ -1030,7 +1076,11 @@ struct wpa_ft_pmk_r0_sa {
int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
struct vlan_description *vlan;
os_time_t expiration; /* 0 for no expiration */
/* TODO: identity, radius_class, EAP type */
u8 *identity;
size_t identity_len;
u8 *radius_cui;
size_t radius_cui_len;
/* TODO: radius_class, EAP type, expiration from EAPOL */
int pmk_r1_pushed;
};
@ -1041,7 +1091,11 @@ struct wpa_ft_pmk_r1_sa {
u8 spa[ETH_ALEN];
int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
struct vlan_description *vlan;
/* TODO: expiration, identity, radius_class, EAP type */
u8 *identity;
size_t identity_len;
u8 *radius_cui;
size_t radius_cui_len;
/* TODO: expiration from EAPOL, radius_class, EAP type */
};
struct wpa_ft_pmk_cache {
@ -1064,6 +1118,8 @@ static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0)
os_memset(r0->pmk_r0, 0, PMK_LEN);
os_free(r0->vlan);
os_free(r0->identity);
os_free(r0->radius_cui);
os_free(r0);
}
@ -1104,6 +1160,8 @@ static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1)
os_memset(r1->pmk_r1, 0, PMK_LEN);
os_free(r1->vlan);
os_free(r1->identity);
os_free(r1->radius_cui);
os_free(r1);
}
@ -1151,7 +1209,9 @@ static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
const u8 *spa, const u8 *pmk_r0,
const u8 *pmk_r0_name, int pairwise,
const struct vlan_description *vlan,
int expires_in)
int expires_in,
const u8 *identity, size_t identity_len,
const u8 *radius_cui, size_t radius_cui_len)
{
struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
struct wpa_ft_pmk_r0_sa *r0;
@ -1178,6 +1238,20 @@ static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
}
*r0->vlan = *vlan;
}
if (identity) {
r0->identity = os_malloc(identity_len);
if (r0->identity) {
os_memcpy(r0->identity, identity, identity_len);
r0->identity_len = identity_len;
}
}
if (radius_cui) {
r0->radius_cui = os_malloc(radius_cui_len);
if (r0->radius_cui) {
os_memcpy(r0->radius_cui, radius_cui, radius_cui_len);
r0->radius_cui_len = radius_cui_len;
}
}
dl_list_add(&cache->pmk_r0, &r0->list);
if (expires_in > 0)
@ -1215,7 +1289,9 @@ static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
const u8 *spa, const u8 *pmk_r1,
const u8 *pmk_r1_name, int pairwise,
const struct vlan_description *vlan,
int expires_in)
int expires_in,
const u8 *identity, size_t identity_len,
const u8 *radius_cui, size_t radius_cui_len)
{
struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
int max_expires_in = wpa_auth->conf.r1_max_key_lifetime;
@ -1242,6 +1318,20 @@ static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
}
*r1->vlan = *vlan;
}
if (identity) {
r1->identity = os_malloc(identity_len);
if (r1->identity) {
os_memcpy(r1->identity, identity, identity_len);
r1->identity_len = identity_len;
}
}
if (radius_cui) {
r1->radius_cui = os_malloc(radius_cui_len);
if (r1->radius_cui) {
os_memcpy(r1->radius_cui, radius_cui, radius_cui_len);
r1->radius_cui_len = radius_cui_len;
}
}
dl_list_add(&cache->pmk_r1, &r1->list);
@ -1256,7 +1346,9 @@ static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
const u8 *spa, const u8 *pmk_r1_name,
u8 *pmk_r1, int *pairwise,
struct vlan_description *vlan)
struct vlan_description *vlan,
const u8 **identity, size_t *identity_len,
const u8 **radius_cui, size_t *radius_cui_len)
{
struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
struct wpa_ft_pmk_r1_sa *r1;
@ -1272,6 +1364,14 @@ static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
*vlan = *r1->vlan;
if (vlan && !r1->vlan)
os_memset(vlan, 0, sizeof(*vlan));
if (identity && identity_len) {
*identity = r1->identity;
*identity_len = r1->identity_len;
}
if (radius_cui && radius_cui_len) {
*radius_cui = r1->radius_cui;
*radius_cui_len = r1->radius_cui_len;
}
return 0;
}
}
@ -1811,6 +1911,8 @@ int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm,
{
int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
struct vlan_description vlan;
const u8 *identity, *radius_cui;
size_t identity_len, radius_cui_len;
if (wpa_ft_get_vlan(sm->wpa_auth, sm->addr, &vlan) < 0) {
wpa_printf(MSG_DEBUG, "FT: vlan not available for STA " MACSTR,
@ -1818,8 +1920,13 @@ int wpa_ft_store_pmk_fils(struct wpa_state_machine *sm,
return -1;
}
identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
&radius_cui);
return wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
sm->pairwise, &vlan, expires_in);
sm->pairwise, &vlan, expires_in, identity,
identity_len, radius_cui, radius_cui_len);
}
@ -1838,6 +1945,8 @@ int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
int psk_local = sm->wpa_auth->conf.ft_psk_generate_local;
int expires_in = sm->wpa_auth->conf.r0_key_lifetime;
struct vlan_description vlan;
const u8 *identity, *radius_cui;
size_t identity_len, radius_cui_len;
if (sm->xxkey_len == 0) {
wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
@ -1851,6 +1960,10 @@ int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
return -1;
}
identity_len = wpa_ft_get_identity(sm->wpa_auth, sm->addr, &identity);
radius_cui_len = wpa_ft_get_radius_cui(sm->wpa_auth, sm->addr,
&radius_cui);
if (wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
r0kh, r0kh_len, sm->addr,
pmk_r0, pmk_r0_name) < 0)
@ -1859,7 +1972,8 @@ int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
sm->pairwise, &vlan, expires_in);
sm->pairwise, &vlan, expires_in, identity,
identity_len, radius_cui, radius_cui_len);
if (wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
pmk_r1, sm->pmk_r1_name) < 0)
@ -1870,7 +1984,8 @@ int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
if (!psk_local || !wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt))
wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1,
sm->pmk_r1_name, sm->pairwise, &vlan,
expires_in);
expires_in, identity, identity_len,
radius_cui, radius_cui_len);
return wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
sm->wpa_auth->addr, sm->pmk_r1_name,
@ -2293,7 +2408,10 @@ void wpa_ft_install_ptk(struct wpa_state_machine *sm)
static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm,
const u8 *req_pmk_r1_name,
u8 *out_pmk_r1, int *out_pairwise,
struct vlan_description *out_vlan)
struct vlan_description *out_vlan,
const u8 **out_identity, size_t *out_identity_len,
const u8 **out_radius_cui,
size_t *out_radius_cui_len)
{
const u8 *pmk = NULL;
u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
@ -2337,6 +2455,16 @@ static int wpa_ft_psk_pmk_r1(struct wpa_state_machine *sm,
return -1;
}
if (out_identity && out_identity_len) {
*out_identity_len = wpa_ft_get_identity(
sm->wpa_auth, sm->addr, out_identity);
}
if (out_radius_cui && out_radius_cui_len) {
*out_radius_cui_len = wpa_ft_get_radius_cui(
sm->wpa_auth, sm->addr, out_radius_cui);
}
return 0;
}
@ -2392,7 +2520,10 @@ static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
const u8 *req_pmk_r0_name,
const u8 *req_pmk_r1_name,
u8 *out_pmk_r1, int *out_pairwise,
struct vlan_description *vlan)
struct vlan_description *vlan,
const u8 **identity, size_t *identity_len,
const u8 **radius_cui,
size_t *radius_cui_len)
{
struct wpa_auth_config *conf = &wpa_auth->conf;
const struct wpa_ft_pmk_r0_sa *r0;
@ -2425,7 +2556,9 @@ static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
}
wpa_ft_store_pmk_r1(wpa_auth, sm->addr, out_pmk_r1, pmk_r1_name,
sm->pairwise, r0->vlan, expires_in);
sm->pairwise, r0->vlan, expires_in,
r0->identity, r0->identity_len,
r0->radius_cui, r0->radius_cui_len);
*out_pairwise = sm->pairwise;
if (vlan) {
@ -2434,6 +2567,17 @@ static int wpa_ft_local_derive_pmk_r1(struct wpa_authenticator *wpa_auth,
else
os_memset(vlan, 0, sizeof(*vlan));
}
if (identity && identity_len) {
*identity = r0->identity;
*identity_len = r0->identity_len;
}
if (radius_cui && radius_cui_len) {
*radius_cui = r0->radius_cui;
*radius_cui_len = r0->radius_cui_len;
}
return 0;
}
@ -2453,6 +2597,8 @@ static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
u8 *pos, *end;
int pairwise;
struct vlan_description vlan;
const u8 *identity, *radius_cui;
size_t identity_len = 0, radius_cui_len = 0;
*resp_ies = NULL;
*resp_ies_len = 0;
@ -2515,19 +2661,24 @@ static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
if (conf->ft_psk_generate_local &&
wpa_key_mgmt_ft_psk(sm->wpa_key_mgmt)) {
if (wpa_ft_psk_pmk_r1(sm, pmk_r1_name, pmk_r1, &pairwise,
&vlan) < 0)
&vlan, &identity, &identity_len,
&radius_cui, &radius_cui_len) < 0)
return WLAN_STATUS_INVALID_PMKID;
wpa_printf(MSG_DEBUG,
"FT: Generated PMK-R1 for FT-PSK locally");
} else if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name,
pmk_r1, &pairwise, &vlan) < 0) {
pmk_r1, &pairwise, &vlan, &identity,
&identity_len, &radius_cui,
&radius_cui_len) < 0) {
wpa_printf(MSG_DEBUG,
"FT: No PMK-R1 available in local cache for the requested PMKR1Name");
if (wpa_ft_local_derive_pmk_r1(sm->wpa_auth, sm,
parse.r0kh_id, parse.r0kh_id_len,
parse.rsn_pmkid,
pmk_r1_name, pmk_r1, &pairwise,
&vlan) == 0) {
&vlan, &identity, &identity_len,
&radius_cui, &radius_cui_len) ==
0) {
wpa_printf(MSG_DEBUG,
"FT: Generated PMK-R1 based on local PMK-R0");
goto pmk_r1_derived;
@ -2575,6 +2726,13 @@ pmk_r1_derived:
wpa_printf(MSG_DEBUG, "FT: Failed to configure VLAN");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
if (wpa_ft_set_identity(sm->wpa_auth, sm->addr,
identity, identity_len) < 0 ||
wpa_ft_set_radius_cui(sm->wpa_auth, sm->addr,
radius_cui, radius_cui_len) < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to configure identity/CUI");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
2 + FT_R1KH_ID_LEN + 200;
@ -3015,6 +3173,10 @@ static int wpa_ft_rrb_build_r0(const u8 *key, const size_t key_len,
.data = f_pairwise },
{ .type = FT_RRB_EXPIRES_IN, .len = sizeof(f_expires_in),
.data = f_expires_in },
{ .type = FT_RRB_IDENTITY, .len = pmk_r0->identity_len,
.data = pmk_r0->identity },
{ .type = FT_RRB_RADIUS_CUI, .len = pmk_r0->radius_cui_len,
.data = pmk_r0->radius_cui },
{ .type = FT_RRB_LAST_EMPTY, .len = 0, .data = NULL },
};
@ -3218,8 +3380,10 @@ static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth,
const u8 *f_pmk_r1_name, *f_pairwise, *f_pmk_r1;
const u8 *f_expires_in;
size_t f_r1kh_id_len, f_s1kh_id_len, f_r0kh_id_len;
const u8 *f_identity, *f_radius_cui;
size_t f_pmk_r1_name_len, f_pairwise_len, f_pmk_r1_len;
size_t f_expires_in_len;
size_t f_identity_len, f_radius_cui_len;
int pairwise;
int ret = -1;
int expires_in;
@ -3326,8 +3490,20 @@ static int wpa_ft_rrb_rx_r1(struct wpa_authenticator *wpa_auth,
wpa_printf(MSG_DEBUG, "FT: vlan %d%s",
le_to_host16(vlan.untagged), vlan.tagged[0] ? "+" : "");
RRB_GET_OPTIONAL(FT_RRB_IDENTITY, identity, msgtype, -1);
if (f_identity)
wpa_hexdump_ascii(MSG_DEBUG, "FT: Identity", f_identity,
f_identity_len);
RRB_GET_OPTIONAL(FT_RRB_RADIUS_CUI, radius_cui, msgtype, -1);
if (f_radius_cui)
wpa_hexdump_ascii(MSG_DEBUG, "FT: CUI", f_radius_cui,
f_radius_cui_len);
if (wpa_ft_store_pmk_r1(wpa_auth, f_s1kh_id, f_pmk_r1, f_pmk_r1_name,
pairwise, &vlan, expires_in) < 0)
pairwise, &vlan, expires_in, f_identity,
f_identity_len, f_radius_cui,
f_radius_cui_len) < 0)
goto out;
ret = 0;