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/*
 * hostapd - PMKSA cache for IEEE 802.11i RSN
 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#ifndef PMKSA_CACHE_H
#define PMKSA_CACHE_H

/**
 * struct rsn_pmksa_cache_entry - PMKSA cache entry
 */
struct rsn_pmksa_cache_entry {
	struct rsn_pmksa_cache_entry *next, *hnext;
	u8 pmkid[PMKID_LEN];
	u8 pmk[PMK_LEN];
	size_t pmk_len;
	os_time_t expiration;
	int akmp; /* WPA_KEY_MGMT_* */
	u8 spa[ETH_ALEN];

	u8 *identity;
	size_t identity_len;
	struct radius_class_data radius_class;
	u8 eap_type_authsrv;
	int vlan_id;
	int opportunistic;
};

struct rsn_pmksa_cache;

struct rsn_pmksa_cache *
pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
				 void *ctx), void *ctx);
void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa);
struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa,
					       const u8 *spa, const u8 *pmkid);
struct rsn_pmksa_cache_entry * pmksa_cache_get_okc(
	struct rsn_pmksa_cache *pmksa, const u8 *spa, const u8 *aa,
	const u8 *pmkid);
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, int akmp);
struct rsn_pmksa_cache_entry *
pmksa_cache_add_okc(struct rsn_pmksa_cache *pmksa,
		    const struct rsn_pmksa_cache_entry *old_entry,
		    const u8 *aa, const u8 *pmkid);
void pmksa_cache_to_eapol_data(struct rsn_pmksa_cache_entry *entry,
			       struct eapol_state_machine *eapol);
void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
	       u8 *pmkid, int use_sha256);

#endif /* PMKSA_CACHE_H */