/** * 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; }