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FILS: ERP-based PMKSA cache addition on AP

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hostapd did not add a new PMKSA cache entry when FILS shared key
authentication was used, i.e., only the initial full authentication
resulted in a PMKSA cache entry being created. Derive the PMKID for the
ERP case as well and add a PMKSA cache entry if the ERP exchange
succeeds.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2017-07-05 17:52:23 +03:00 committed by Jouni Malinen
parent bfe448331f
commit b3e567c890
2 changed files with 29 additions and 1 deletions
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26
src/ap/ieee802_11.c
View file

@ -1229,6 +1229,14 @@ void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta,
wpa_printf(MSG_DEBUG,
"FILS: Will send Authentication frame once the response from authentication server is available");
sta->flags |= WLAN_STA_PENDING_FILS_ERP;
/* Calculate pending PMKID here so that we do not need
* to maintain a copy of the EAP-Initiate/Reauth
* message. */
if (fils_pmkid_erp(wpa_auth_sta_key_mgmt(sta->wpa_sm),
elems.fils_wrapped_data,
elems.fils_wrapped_data_len,
sta->fils_erp_pmkid) == 0)
sta->fils_erp_pmkid_set = 1;
return;
#else /* CONFIG_NO_RADIUS */
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
@ -1388,6 +1396,24 @@ prepare_auth_resp_fils(struct hostapd_data *hapd,
goto fail;
}
pmk = pmk_buf;
if (sta->fils_erp_pmkid_set) {
/* TODO: get PMKLifetime from WPA parameters */
unsigned int dot11RSNAConfigPMKLifetime = 43200;
sta->fils_erp_pmkid_set = 0;
if (wpa_auth_pmksa_add2(
hapd->wpa_auth, sta->addr,
pmk, pmk_len,
sta->fils_erp_pmkid,
sta->session_timeout_set ?
sta->session_timeout :
dot11RSNAConfigPMKLifetime,
wpa_auth_sta_key_mgmt(sta->wpa_sm)) < 0) {
wpa_printf(MSG_ERROR,
"FILS: Failed to add PMKSA cache entry based on ERP");
}
}
} else if (pmksa) {
pmk = pmksa->pmk;
pmk_len = pmksa->pmk_len;

4
src/ap/sta_info.h
View file

@ -12,11 +12,11 @@
#ifdef CONFIG_MESH
/* needed for mesh_plink_state enum */
#include "common/defs.h"
#include "common/wpa_common.h"
#endif /* CONFIG_MESH */
#include "list.h"
#include "vlan.h"
#include "common/wpa_common.h"
#include "common/ieee802_11_defs.h"
/* STA flags */
@ -226,10 +226,12 @@ struct sta_info {
#ifdef CONFIG_FILS
u8 fils_snonce[FILS_NONCE_LEN];
u8 fils_session[FILS_SESSION_LEN];
u8 fils_erp_pmkid[PMKID_LEN];
u8 *fils_pending_assoc_req;
size_t fils_pending_assoc_req_len;
unsigned int fils_pending_assoc_is_reassoc:1;
unsigned int fils_dhcp_rapid_commit_proxy:1;
unsigned int fils_erp_pmkid_set:1;
struct wpabuf *fils_hlp_resp;
struct wpabuf *hlp_dhcp_discover;
void (*fils_pending_cb)(struct hostapd_data *hapd, struct sta_info *sta,