int wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies,
size_t ies_len, const u8 *src_addr)
{
struct wpa_ft_ies parse;
struct rsn_mdie *mdie;
struct rsn_ftie *ftie;
unsigned int count;
u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
"enabled for this connection");
return -1;
}
if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
return -1;
}
mdie = (struct rsn_mdie *) parse.mdie;
if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
os_memcmp(mdie->mobility_domain, sm->mobility_domain,
MOBILITY_DOMAIN_ID_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
return -1;
}
ftie = (struct rsn_ftie *) parse.ftie;
if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
return -1;
}
if (os_memcmp(ftie->snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
ftie->snonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
sm->snonce, WPA_NONCE_LEN);
return -1;
}
if (os_memcmp(ftie->anonce, sm->anonce, WPA_NONCE_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
ftie->anonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
sm->anonce, WPA_NONCE_LEN);
return -1;
}
if (parse.r0kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
return -1;
}
if (parse.r0kh_id_len != sm->r0kh_id_len ||
os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
{
wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
"the current R0KH-ID");
wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
parse.r0kh_id, parse.r0kh_id_len);
wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
sm->r0kh_id, sm->r0kh_id_len);
return -1;
}
if (parse.r1kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
return -1;
}
if (os_memcmp_const(parse.r1kh_id, sm->r1kh_id, FT_R1KH_ID_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
"ReassocResp");
return -1;
}
if (parse.rsn_pmkid == NULL ||
os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
{
wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
"RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
return -1;
}
count = 3;
if (parse.ric)
count += ieee802_11_ie_count(parse.ric, parse.ric_len);
if (ftie->mic_control[1] != count) {
wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
"Control: received %u expected %u",
ftie->mic_control[1], count);
return -1;
}
if (wpa_ft_mic(sm->ptk.kck, sm->ptk.kck_len, sm->own_addr, src_addr, 6,
parse.mdie - 2, parse.mdie_len + 2,
parse.ftie - 2, parse.ftie_len + 2,
parse.rsn - 2, parse.rsn_len + 2,
parse.ric, parse.ric_len,
mic) < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
return -1;
}
if (os_memcmp_const(mic, ftie->mic, 16) != 0) {
wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
return -1;
}
if (wpa_ft_process_gtk_subelem(sm, parse.gtk, parse.gtk_len) < 0)
return -1;
#ifdef CONFIG_IEEE80211W
if (wpa_ft_process_igtk_subelem(sm, parse.igtk, parse.igtk_len) < 0)
return -1;
#endif /* CONFIG_IEEE80211W */
if (sm->set_ptk_after_assoc) {
wpa_printf(MSG_DEBUG, "FT: Try to set PTK again now that we "
"are associated");
if (wpa_ft_install_ptk(sm, src_addr) < 0)
return -1;
sm->set_ptk_after_assoc = 0;
}
if (parse.ric) {
wpa_hexdump(MSG_MSGDUMP, "FT: RIC Response",
parse.ric, parse.ric_len);
/* TODO: parse response and inform driver about results when
* using wpa_supplicant SME */
}
wpa_printf(MSG_DEBUG, "FT: Completed successfully");
return 0;
}
int wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
int ft_action, const u8 *target_ap)
{
u8 *ft_ies;
size_t ft_ies_len, ptk_len;
struct wpa_ft_ies parse;
struct rsn_mdie *mdie;
struct rsn_ftie *ftie;
u8 ptk_name[WPA_PMK_NAME_LEN];
int ret;
const u8 *bssid;
wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
if (ft_action) {
if (!sm->over_the_ds_in_progress) {
wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
"- drop FT Action Response");
return -1;
}
if (os_memcmp(target_ap, sm->target_ap, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
"with this Target AP - drop FT Action "
"Response");
return -1;
}
}
if (sm->key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
sm->key_mgmt != WPA_KEY_MGMT_FT_PSK) {
wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
"enabled for this connection");
return -1;
}
if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
return -1;
}
mdie = (struct rsn_mdie *) parse.mdie;
if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
os_memcmp(mdie->mobility_domain, sm->mobility_domain,
MOBILITY_DOMAIN_ID_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
return -1;
}
ftie = (struct rsn_ftie *) parse.ftie;
if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
return -1;
}
if (parse.r0kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
return -1;
}
if (parse.r0kh_id_len != sm->r0kh_id_len ||
os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
"the current R0KH-ID");
wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
parse.r0kh_id, parse.r0kh_id_len);
wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
sm->r0kh_id, sm->r0kh_id_len);
return -1;
}
if (parse.r1kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
return -1;
}
if (parse.rsn_pmkid == NULL ||
os_memcmp(parse.rsn_pmkid, sm->pmk_r0_name, WPA_PMK_NAME_LEN)) {
wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name (PMKID) in "
"RSNIE");
return -1;
}
os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", sm->r1kh_id, FT_R1KH_ID_LEN);
wpa_hexdump(MSG_DEBUG, "FT: SNonce", sm->snonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "FT: ANonce", ftie->anonce, WPA_NONCE_LEN);
wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_name, sm->r1kh_id,
sm->own_addr, sm->pmk_r1, sm->pmk_r1_name);
wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", sm->pmk_r1, PMK_LEN);
wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
sm->pmk_r1_name, WPA_PMK_NAME_LEN);
bssid = target_ap;
ptk_len = sm->pairwise_cipher == WPA_CIPHER_CCMP ? 48 : 64;
wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->snonce, ftie->anonce, sm->own_addr,
bssid, sm->pmk_r1_name,
(u8 *) &sm->ptk, ptk_len, ptk_name);
wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
(u8 *) &sm->ptk, ptk_len);
wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, ftie->anonce,
sm->pmk_r1_name, sm->ptk.kck, bssid);
if (ft_ies) {
wpa_sm_update_ft_ies(sm, sm->mobility_domain,
ft_ies, ft_ies_len);
os_free(ft_ies);
}
ret = wpa_ft_install_ptk(sm, bssid);
if (ret == 0) {
sm->ft_completed = 1;
if (ft_action) {
/* TODO: trigger re-association to the Target AP;
* MLME is now doing this automatically, but it should
* really be done only if we get here successfully. */
os_memcpy(sm->bssid, target_ap, ETH_ALEN);
}
}
return ret;
}
int wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
int ft_action, const u8 *target_ap,
const u8 *ric_ies, size_t ric_ies_len)
{
u8 *ft_ies;
size_t ft_ies_len;
struct wpa_ft_ies parse;
struct rsn_mdie *mdie;
struct rsn_ftie *ftie;
u8 ptk_name[WPA_PMK_NAME_LEN];
int ret;
const u8 *bssid;
wpa_hexdump(MSG_DEBUG, "FT: Response IEs", ies, ies_len);
wpa_hexdump(MSG_DEBUG, "FT: RIC IEs", ric_ies, ric_ies_len);
if (ft_action) {
if (!sm->over_the_ds_in_progress) {
wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
"- drop FT Action Response");
return -1;
}
if (os_memcmp(target_ap, sm->target_ap, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: No over-the-DS in progress "
"with this Target AP - drop FT Action "
"Response");
return -1;
}
}
if (!wpa_key_mgmt_ft(sm->key_mgmt)) {
wpa_printf(MSG_DEBUG, "FT: Reject FT IEs since FT is not "
"enabled for this connection");
return -1;
}
if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
return -1;
}
mdie = (struct rsn_mdie *) parse.mdie;
if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
os_memcmp(mdie->mobility_domain, sm->mobility_domain,
MOBILITY_DOMAIN_ID_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
return -1;
}
ftie = (struct rsn_ftie *) parse.ftie;
if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
return -1;
}
if (os_memcmp(ftie->snonce, sm->snonce, WPA_NONCE_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
ftie->snonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
sm->snonce, WPA_NONCE_LEN);
return -1;
}
if (parse.r0kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
return -1;
}
if (parse.r0kh_id_len != sm->r0kh_id_len ||
os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
{
wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
"the current R0KH-ID");
wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
parse.r0kh_id, parse.r0kh_id_len);
wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
sm->r0kh_id, sm->r0kh_id_len);
return -1;
}
if (parse.r1kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
return -1;
}
if (parse.rsn_pmkid == NULL ||
os_memcmp_const(parse.rsn_pmkid, sm->pmk_r0_name, WPA_PMK_NAME_LEN))
{
wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name (PMKID) in "
"RSNIE");
return -1;
}
os_memcpy(sm->r1kh_id, parse.r1kh_id, FT_R1KH_ID_LEN);
wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", sm->r1kh_id, FT_R1KH_ID_LEN);
wpa_hexdump(MSG_DEBUG, "FT: SNonce", sm->snonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "FT: ANonce", ftie->anonce, WPA_NONCE_LEN);
os_memcpy(sm->anonce, ftie->anonce, WPA_NONCE_LEN);
wpa_derive_pmk_r1(sm->pmk_r0, sm->pmk_r0_name, sm->r1kh_id,
sm->own_addr, sm->pmk_r1, sm->pmk_r1_name);
wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", sm->pmk_r1, PMK_LEN);
wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name",
sm->pmk_r1_name, WPA_PMK_NAME_LEN);
bssid = target_ap;
if (wpa_pmk_r1_to_ptk(sm->pmk_r1, sm->snonce, ftie->anonce,
sm->own_addr, bssid, sm->pmk_r1_name, &sm->ptk,
ptk_name, sm->key_mgmt, sm->pairwise_cipher) < 0)
return -1;
ft_ies = wpa_ft_gen_req_ies(sm, &ft_ies_len, ftie->anonce,
sm->pmk_r1_name,
sm->ptk.kck, sm->ptk.kck_len, bssid,
ric_ies, ric_ies_len,
parse.mdie ? parse.mdie - 2 : NULL);
if (ft_ies) {
wpa_sm_update_ft_ies(sm, sm->mobility_domain,
ft_ies, ft_ies_len);
os_free(ft_ies);
}
wpa_sm_mark_authenticated(sm, bssid);
ret = wpa_ft_install_ptk(sm, bssid);
if (ret) {
/*
* Some drivers do not support key configuration when we are
* not associated with the target AP. Work around this by
* trying again after the following reassociation gets
* completed.
*/
wpa_printf(MSG_DEBUG, "FT: Failed to set PTK prior to "
"association - try again after reassociation");
sm->set_ptk_after_assoc = 1;
} else
sm->set_ptk_after_assoc = 0;
sm->ft_completed = 1;
if (ft_action) {
/*
* The caller is expected trigger re-association with the
* Target AP.
*/
os_memcpy(sm->bssid, target_ap, ETH_ALEN);
}
return 0;
}
static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
const u8 *ies, size_t ies_len,
u8 **resp_ies, size_t *resp_ies_len)
{
struct rsn_mdie *mdie;
struct rsn_ftie *ftie;
u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
u8 ptk_name[WPA_PMK_NAME_LEN];
struct wpa_auth_config *conf;
struct wpa_ft_ies parse;
size_t buflen, ptk_len;
int ret;
u8 *pos, *end;
int pairwise;
*resp_ies = NULL;
*resp_ies_len = 0;
sm->pmk_r1_name_valid = 0;
conf = &sm->wpa_auth->conf;
wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
ies, ies_len);
if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
mdie = (struct rsn_mdie *) parse.mdie;
if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
os_memcmp(mdie->mobility_domain,
sm->wpa_auth->conf.mobility_domain,
MOBILITY_DOMAIN_ID_LEN) != 0) {
wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
return WLAN_STATUS_INVALID_MDIE;
}
ftie = (struct rsn_ftie *) parse.ftie;
if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
return WLAN_STATUS_INVALID_FTIE;
}
os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
if (parse.r0kh_id == NULL) {
wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
return WLAN_STATUS_INVALID_FTIE;
}
wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
parse.r0kh_id, parse.r0kh_id_len);
os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
sm->r0kh_id_len = parse.r0kh_id_len;
if (parse.rsn_pmkid == NULL) {
wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
return WLAN_STATUS_INVALID_PMKID;
}
wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
parse.rsn_pmkid, WPA_PMK_NAME_LEN);
wpa_derive_pmk_r1_name(parse.rsn_pmkid,
sm->wpa_auth->conf.r1_key_holder, sm->addr,
pmk_r1_name);
wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
pmk_r1_name, WPA_PMK_NAME_LEN);
if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
&pairwise) < 0) {
if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
wpa_printf(MSG_DEBUG, "FT: Did not have matching "
"PMK-R1 and unknown R0KH-ID");
return WLAN_STATUS_INVALID_PMKID;
}
/*
* TODO: Should return "status pending" (and the caller should
* not send out response now). The real response will be sent
* once the response from R0KH is received.
*/
return WLAN_STATUS_INVALID_PMKID;
}
wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
sm->pmk_r1_name_valid = 1;
os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
"ANonce");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
sm->SNonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
sm->ANonce, WPA_NONCE_LEN);
ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
sm->wpa_auth->addr, pmk_r1_name,
(u8 *) &sm->PTK, ptk_len, ptk_name);
wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
(u8 *) &sm->PTK, ptk_len);
wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
sm->pairwise = pairwise;
wpa_ft_install_ptk(sm);
buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
2 + FT_R1KH_ID_LEN + 200;
*resp_ies = os_zalloc(buflen);
if (*resp_ies == NULL) {
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
pos = *resp_ies;
end = *resp_ies + buflen;
ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
if (ret < 0) {
os_free(*resp_ies);
*resp_ies = NULL;
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
pos += ret;
ret = wpa_write_mdie(conf, pos, end - pos);
if (ret < 0) {
os_free(*resp_ies);
*resp_ies = NULL;
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
pos += ret;
ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
if (ret < 0) {
os_free(*resp_ies);
*resp_ies = NULL;
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
pos += ret;
*resp_ies_len = pos - *resp_ies;
return WLAN_STATUS_SUCCESS;
}
