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OCV: Include and verify OCI in the FT handshake 

Include and verify the the OCI element in (Re)Association Request and
Response frames of the FT handshake. In case verification fails, the
handshake message is silently ignored.

Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be>
This commit is contained in:
Mathy Vanhoef 2018-08-06 15:46:32 -04:00 committed by Jouni Malinen
parent 6734ba0c00
commit dd8df6af0b
2 changed files with 109 additions and 0 deletions
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68
src/ap/wpa_auth_ft.c
View File

@ -13,6 +13,8 @@
#include "utils/list.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/ocv.h"
#include "drivers/driver.h"
#include "crypto/aes.h"
#include "crypto/aes_siv.h"
#include "crypto/aes_wrap.h"
@ -727,6 +729,17 @@ static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
}
#ifdef CONFIG_OCV
static int wpa_channel_info(struct wpa_authenticator *wpa_auth,
struct wpa_channel_info *ci)
{
if (!wpa_auth->cb->channel_info)
return -1;
return wpa_auth->cb->channel_info(wpa_auth->cb_ctx, ci);
}
#endif /* CONFIG_OCV */
int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
{
u8 *pos = buf;
@ -2430,6 +2443,35 @@ u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
os_free(igtk);
}
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_OCV
if (wpa_auth_uses_ocv(sm)) {
struct wpa_channel_info ci;
u8 *nbuf, *ocipos;
if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
wpa_printf(MSG_WARNING,
"Failed to get channel info for OCI element");
os_free(subelem);
return NULL;
}
subelem_len += 2 + OCV_OCI_LEN;
nbuf = os_realloc(subelem, subelem_len);
if (!nbuf) {
os_free(subelem);
return NULL;
}
subelem = nbuf;
ocipos = subelem + subelem_len - 2 - OCV_OCI_LEN;
*ocipos++ = FTIE_SUBELEM_OCI;
*ocipos++ = OCV_OCI_LEN;
if (ocv_insert_oci(&ci, &ocipos) < 0) {
os_free(subelem);
return NULL;
}
}
#endif /* CONFIG_OCV */
} else {
r0kh_id = conf->r0_key_holder;
r0kh_id_len = conf->r0_key_holder_len;
@ -3178,6 +3220,32 @@ u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
return WLAN_STATUS_INVALID_FTIE;
}
#ifdef CONFIG_OCV
if (wpa_auth_uses_ocv(sm)) {
struct wpa_channel_info ci;
int tx_chanwidth;
int tx_seg1_idx;
if (wpa_channel_info(sm->wpa_auth, &ci) != 0) {
wpa_printf(MSG_WARNING,
"Failed to get channel info to validate received OCI in (Re)Assoc Request");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
if (get_sta_tx_parameters(sm,
channel_width_to_int(ci.chanwidth),
ci.seg1_idx, &tx_chanwidth,
&tx_seg1_idx) < 0)
return WLAN_STATUS_UNSPECIFIED_FAILURE;
if (ocv_verify_tx_params(parse.oci, parse.oci_len, &ci,
tx_chanwidth, tx_seg1_idx) != 0) {
wpa_printf(MSG_WARNING, "%s", ocv_errorstr);
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
}
#endif /* CONFIG_OCV */
return WLAN_STATUS_SUCCESS;
}

41
src/rsn_supp/wpa_ft.c
View File

@ -14,6 +14,8 @@
#include "crypto/random.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/ocv.h"
#include "drivers/driver.h"
#include "wpa.h"
#include "wpa_i.h"
@ -325,6 +327,26 @@ static u8 * wpa_ft_gen_req_ies(struct wpa_sm *sm, size_t *len,
*pos++ = sm->r0kh_id_len;
os_memcpy(pos, sm->r0kh_id, sm->r0kh_id_len);
pos += sm->r0kh_id_len;
#ifdef CONFIG_OCV
if (kck && wpa_sm_ocv_enabled(sm)) {
/* OCI sub-element in the third FT message */
struct wpa_channel_info ci;
if (wpa_sm_channel_info(sm, &ci) != 0) {
wpa_printf(MSG_WARNING,
"Failed to get channel info for OCI element in FTE");
os_free(buf);
return NULL;
}
*pos++ = FTIE_SUBELEM_OCI;
*pos++ = OCV_OCI_LEN;
if (ocv_insert_oci(&ci, &pos) < 0) {
os_free(buf);
return NULL;
}
}
#endif /* CONFIG_OCV */
*ftie_len = pos - ftie_len - 1;
if (ric_ies) {
@ -963,6 +985,25 @@ int wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies,
return -1;
}
#ifdef CONFIG_OCV
if (wpa_sm_ocv_enabled(sm)) {
struct wpa_channel_info ci;
if (wpa_sm_channel_info(sm, &ci) != 0) {
wpa_printf(MSG_WARNING,
"Failed to get channel info to validate received OCI in (Re)Assoc Response");
return -1;
}
if (ocv_verify_tx_params(parse.oci, parse.oci_len, &ci,
channel_width_to_int(ci.chanwidth),
ci.seg1_idx) != 0) {
wpa_printf(MSG_WARNING, "%s", ocv_errorstr);
return -1;
}
}
#endif /* CONFIG_OCV */
sm->ft_reassoc_completed = 1;
if (wpa_ft_process_gtk_subelem(sm, parse.gtk, parse.gtk_len) < 0)