/** * 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; }
/** * pmksa_cache_auth_create_entry - Create a PMKSA cache entry * @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 creates a PMKSA entry. */ struct rsn_pmksa_cache_entry * pmksa_cache_auth_create_entry(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; 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, 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); return entry; }
/** * pmksa_cache_add - Add a PMKSA cache entry * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() * @pmk: The new pairwise master key * @pmk_len: PMK length in bytes, usually PMK_LEN (32) * @aa: Authenticator address * @spa: Supplicant address * @session_timeout: Session timeout * @eapol: Pointer to EAPOL state machine data * 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_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa, int session_timeout, struct eapol_state_machine *eapol) { struct rsn_pmksa_cache_entry *entry, *pos, *prev; struct os_time now; if (pmk_len > PMK_LEN) return NULL; entry = wpa_zalloc(sizeof(*entry)); if (entry == NULL) return NULL; memcpy(entry->pmk, pmk, pmk_len); entry->pmk_len = pmk_len; rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid); os_get_time(&now); entry->expiration = now.sec; if (session_timeout > 0) entry->expiration += session_timeout; else entry->expiration += dot11RSNAConfigPMKLifetime; entry->akmp = WPA_KEY_MGMT_IEEE8021X; 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_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); } /* Add the new entry; order by expiration time */ pos = pmksa->pmksa; prev = NULL; while (pos) { if (pos->expiration > entry->expiration) break; prev = pos; pos = pos->next; } if (prev == NULL) { entry->next = pmksa->pmksa; pmksa->pmksa = entry; } else { entry->next = prev->next; prev->next = entry; } entry->hnext = pmksa->pmkid[PMKID_HASH(entry->pmkid)]; pmksa->pmkid[PMKID_HASH(entry->pmkid)] = entry; pmksa->pmksa_count++; wpa_printf(MSG_DEBUG, "RSN: added PMKSA cache entry for " MACSTR, MAC2STR(entry->spa)); wpa_hexdump(MSG_DEBUG, "RSN: added PMKID", entry->pmkid, PMKID_LEN); pmksa_cache_set_expiration(pmksa) ; return entry; }