/**
* pmksa_cache_auth_add_entry - Add a PMKSA cache entry
* @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
* @entry: Pointer to PMKSA cache entry
*
* This function adds PMKSA cache entry to the PMKSA cache. If an old entry is
* already in the cache for the same Supplicant, this entry will be replaced
* with the new entry. PMKID will be calculated based on the PMK.
*/
int pmksa_cache_auth_add_entry(struct rsn_pmksa_cache *pmksa,
struct rsn_pmksa_cache_entry *entry)
{
struct rsn_pmksa_cache_entry *pos;
if (entry == NULL)
return -1;
/* Replace an old entry for the same STA (if found) with the new entry
*/
pos = pmksa_cache_auth_get(pmksa, entry->spa, NULL);
if (pos)
pmksa_cache_free_entry(pmksa, pos);
if (pmksa->pmksa_count >= pmksa_cache_max_entries && pmksa->pmksa) {
/* Remove the oldest entry to make room for the new entry */
wpa_printf(MSG_DEBUG, "RSN: removed the oldest PMKSA cache "
"entry (for " MACSTR ") to make room for new one",
MAC2STR(pmksa->pmksa->spa));
pmksa_cache_free_entry(pmksa, pmksa->pmksa);
}
pmksa_cache_link_entry(pmksa, entry);
return 0;
}
/**
* pmksa_cache_auth_add - Add a PMKSA cache entry
* @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
* @pmk: The new pairwise master key
* @pmk_len: PMK length in bytes, usually PMK_LEN (32)
* @pmkid: Calculated PMKID
* @kck: Key confirmation key or %NULL if not yet derived
* @kck_len: KCK length in bytes
* @aa: Authenticator address
* @spa: Supplicant address
* @session_timeout: Session timeout
* @eapol: Pointer to EAPOL state machine data
* @akmp: WPA_KEY_MGMT_* used in key derivation
* Returns: Pointer to the added PMKSA cache entry or %NULL on error
*
* This function create a PMKSA entry for a new PMK and adds it to the PMKSA
* cache. If an old entry is already in the cache for the same Supplicant,
* this entry will be replaced with the new entry. PMKID will be calculated
* based on the PMK.
*/
struct rsn_pmksa_cache_entry *
pmksa_cache_auth_add(struct rsn_pmksa_cache *pmksa,
const u8 *pmk, size_t pmk_len, const u8 *pmkid,
const u8 *kck, size_t kck_len,
const u8 *aa, const u8 *spa, int session_timeout,
struct eapol_state_machine *eapol, int akmp)
{
struct rsn_pmksa_cache_entry *entry, *pos;
struct os_reltime now;
if (pmk_len > PMK_LEN_MAX)
return NULL;
if (wpa_key_mgmt_suite_b(akmp) && !kck)
return NULL;
entry = os_zalloc(sizeof(*entry));
if (entry == NULL)
return NULL;
os_memcpy(entry->pmk, pmk, pmk_len);
entry->pmk_len = pmk_len;
if (pmkid)
os_memcpy(entry->pmkid, pmkid, PMKID_LEN);
else if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
rsn_pmkid_suite_b_192(kck, kck_len, aa, spa, entry->pmkid);
else if (wpa_key_mgmt_suite_b(akmp))
rsn_pmkid_suite_b(kck, kck_len, aa, spa, entry->pmkid);
else
rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid,
wpa_key_mgmt_sha256(akmp));
os_get_reltime(&now);
entry->expiration = now.sec;
if (session_timeout > 0)
entry->expiration += session_timeout;
else
entry->expiration += dot11RSNAConfigPMKLifetime;
entry->akmp = akmp;
os_memcpy(entry->spa, spa, ETH_ALEN);
pmksa_cache_from_eapol_data(entry, eapol);
/* Replace an old entry for the same STA (if found) with the new entry
*/
pos = pmksa_cache_auth_get(pmksa, spa, NULL);
if (pos)
pmksa_cache_free_entry(pmksa, pos);
if (pmksa->pmksa_count >= pmksa_cache_max_entries && pmksa->pmksa) {
/* Remove the oldest entry to make room for the new entry */
wpa_printf(MSG_DEBUG, "RSN: removed the oldest PMKSA cache "
"entry (for " MACSTR ") to make room for new one",
MAC2STR(pmksa->pmksa->spa));
pmksa_cache_free_entry(pmksa, pmksa->pmksa);
}
pmksa_cache_link_entry(pmksa, entry);
return entry;
}
int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm,
const u8 *wpa_ie, size_t wpa_ie_len,
const u8 *mdie, size_t mdie_len)
{
struct wpa_ie_data data;
int ciphers, key_mgmt, res, version;
u32 selector;
size_t i;
const u8 *pmkid = NULL;
if (wpa_auth == NULL || sm == NULL)
return WPA_NOT_ENABLED;
if (wpa_ie == NULL || wpa_ie_len < 1)
return WPA_INVALID_IE;
if (wpa_ie[0] == WLAN_EID_RSN)
version = WPA_PROTO_RSN;
else
version = WPA_PROTO_WPA;
if (!(wpa_auth->conf.wpa & version)) {
wpa_printf(MSG_DEBUG, "Invalid WPA proto (%d) from " MACSTR,
version, MAC2STR(sm->addr));
return WPA_INVALID_PROTO;
}
if (version == WPA_PROTO_RSN) {
res = wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, &data);
selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
if (0) {
}
#ifdef CONFIG_IEEE80211R
else if (data.key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
selector = RSN_AUTH_KEY_MGMT_FT_802_1X;
else if (data.key_mgmt & WPA_KEY_MGMT_FT_PSK)
selector = RSN_AUTH_KEY_MGMT_FT_PSK;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
selector = RSN_AUTH_KEY_MGMT_802_1X_SHA256;
else if (data.key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
selector = RSN_AUTH_KEY_MGMT_PSK_SHA256;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_SAE
else if (data.key_mgmt & WPA_KEY_MGMT_SAE)
selector = RSN_AUTH_KEY_MGMT_SAE;
else if (data.key_mgmt & WPA_KEY_MGMT_FT_SAE)
selector = RSN_AUTH_KEY_MGMT_FT_SAE;
#endif /* CONFIG_SAE */
else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
selector = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
selector = wpa_cipher_to_suite(WPA_PROTO_RSN,
data.pairwise_cipher);
if (!selector)
selector = RSN_CIPHER_SUITE_CCMP;
wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
selector = wpa_cipher_to_suite(WPA_PROTO_RSN,
data.group_cipher);
if (!selector)
selector = RSN_CIPHER_SUITE_CCMP;
wpa_auth->dot11RSNAGroupCipherSelected = selector;
} else {
res = wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, &data);
selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X)
selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X;
else if (data.key_mgmt & WPA_KEY_MGMT_PSK)
selector = WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X;
wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector;
selector = wpa_cipher_to_suite(WPA_PROTO_WPA,
data.pairwise_cipher);
if (!selector)
selector = RSN_CIPHER_SUITE_TKIP;
wpa_auth->dot11RSNAPairwiseCipherSelected = selector;
selector = wpa_cipher_to_suite(WPA_PROTO_WPA,
data.group_cipher);
if (!selector)
selector = WPA_CIPHER_SUITE_TKIP;
wpa_auth->dot11RSNAGroupCipherSelected = selector;
}
if (res) {
wpa_printf(MSG_DEBUG, "Failed to parse WPA/RSN IE from "
MACSTR " (res=%d)", MAC2STR(sm->addr), res);
wpa_hexdump(MSG_DEBUG, "WPA/RSN IE", wpa_ie, wpa_ie_len);
return WPA_INVALID_IE;
}
if (data.group_cipher != wpa_auth->conf.wpa_group) {
wpa_printf(MSG_DEBUG, "Invalid WPA group cipher (0x%x) from "
MACSTR, data.group_cipher, MAC2STR(sm->addr));
return WPA_INVALID_GROUP;
}
key_mgmt = data.key_mgmt & wpa_auth->conf.wpa_key_mgmt;
if (!key_mgmt) {
wpa_printf(MSG_DEBUG, "Invalid WPA key mgmt (0x%x) from "
MACSTR, data.key_mgmt, MAC2STR(sm->addr));
return WPA_INVALID_AKMP;
}
if (0) {
}
#ifdef CONFIG_IEEE80211R
else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
else if (key_mgmt & WPA_KEY_MGMT_FT_PSK)
sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
else if (key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_SAE
else if (key_mgmt & WPA_KEY_MGMT_SAE)
sm->wpa_key_mgmt = WPA_KEY_MGMT_SAE;
else if (key_mgmt & WPA_KEY_MGMT_FT_SAE)
sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_SAE;
#endif /* CONFIG_SAE */
else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X)
sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X;
else
sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
if (version == WPA_PROTO_RSN)
ciphers = data.pairwise_cipher & wpa_auth->conf.rsn_pairwise;
else
ciphers = data.pairwise_cipher & wpa_auth->conf.wpa_pairwise;
if (!ciphers) {
wpa_printf(MSG_DEBUG, "Invalid %s pairwise cipher (0x%x) "
"from " MACSTR,
version == WPA_PROTO_RSN ? "RSN" : "WPA",
data.pairwise_cipher, MAC2STR(sm->addr));
return WPA_INVALID_PAIRWISE;
}
#ifdef CONFIG_IEEE80211W
if (wpa_auth->conf.ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
if (!(data.capabilities & WPA_CAPABILITY_MFPC)) {
wpa_printf(MSG_DEBUG, "Management frame protection "
"required, but client did not enable it");
return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
}
if (ciphers & WPA_CIPHER_TKIP) {
wpa_printf(MSG_DEBUG, "Management frame protection "
"cannot use TKIP");
return WPA_MGMT_FRAME_PROTECTION_VIOLATION;
}
if (data.mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) {
wpa_printf(MSG_DEBUG, "Unsupported management group "
"cipher %d", data.mgmt_group_cipher);
return WPA_INVALID_MGMT_GROUP_CIPHER;
}
}
if (wpa_auth->conf.ieee80211w == NO_MGMT_FRAME_PROTECTION ||
!(data.capabilities & WPA_CAPABILITY_MFPC))
sm->mgmt_frame_prot = 0;
else
sm->mgmt_frame_prot = 1;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_IEEE80211R
if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) {
if (mdie == NULL || mdie_len < MOBILITY_DOMAIN_ID_LEN + 1) {
wpa_printf(MSG_DEBUG, "RSN: Trying to use FT, but "
"MDIE not included");
return WPA_INVALID_MDIE;
}
if (os_memcmp(mdie, wpa_auth->conf.mobility_domain,
MOBILITY_DOMAIN_ID_LEN) != 0) {
wpa_hexdump(MSG_DEBUG, "RSN: Attempted to use unknown "
"MDIE", mdie, MOBILITY_DOMAIN_ID_LEN);
return WPA_INVALID_MDIE;
}
}
#endif /* CONFIG_IEEE80211R */
if (ciphers & WPA_CIPHER_CCMP)
sm->pairwise = WPA_CIPHER_CCMP;
else if (ciphers & WPA_CIPHER_GCMP)
sm->pairwise = WPA_CIPHER_GCMP;
else
sm->pairwise = WPA_CIPHER_TKIP;
/* TODO: clear WPA/WPA2 state if STA changes from one to another */
if (wpa_ie[0] == WLAN_EID_RSN)
sm->wpa = WPA_VERSION_WPA2;
else
sm->wpa = WPA_VERSION_WPA;
sm->pmksa = NULL;
for (i = 0; i < data.num_pmkid; i++) {
wpa_hexdump(MSG_DEBUG, "RSN IE: STA PMKID",
&data.pmkid[i * PMKID_LEN], PMKID_LEN);
sm->pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sm->addr,
&data.pmkid[i * PMKID_LEN]);
if (sm->pmksa) {
pmkid = sm->pmksa->pmkid;
break;
}
}
for (i = 0; sm->pmksa == NULL && wpa_auth->conf.okc &&
i < data.num_pmkid; i++) {
struct wpa_auth_okc_iter_data idata;
idata.pmksa = NULL;
idata.aa = wpa_auth->addr;
idata.spa = sm->addr;
idata.pmkid = &data.pmkid[i * PMKID_LEN];
wpa_auth_for_each_auth(wpa_auth, wpa_auth_okc_iter, &idata);
if (idata.pmksa) {
wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
"OKC match for PMKID");
sm->pmksa = pmksa_cache_add_okc(wpa_auth->pmksa,
idata.pmksa,
wpa_auth->addr,
idata.pmkid);
pmkid = idata.pmkid;
break;
}
}
if (sm->pmksa) {
wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG,
"PMKID found from PMKSA cache "
"eap_type=%d vlan_id=%d",
sm->pmksa->eap_type_authsrv,
sm->pmksa->vlan_id);
os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmkid, PMKID_LEN);
}
if (sm->wpa_ie == NULL || sm->wpa_ie_len < wpa_ie_len) {
os_free(sm->wpa_ie);
sm->wpa_ie = os_malloc(wpa_ie_len);
if (sm->wpa_ie == NULL)
return WPA_ALLOC_FAIL;
}
os_memcpy(sm->wpa_ie, wpa_ie, wpa_ie_len);
sm->wpa_ie_len = wpa_ie_len;
return WPA_IE_OK;
}
