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/* $OpenBSD: ieee80211_crypto.h,v 1.27 2020/05/15 14:21:09 stsp Exp $ */
/*-
* Copyright (c) 2007,2008 Damien Bergamini <damien.bergamini@free.fr>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _NET80211_IEEE80211_CRYPTO_H_
#define _NET80211_IEEE80211_CRYPTO_H_
/*
* 802.11 protocol crypto-related definitions.
*/
/*
* 802.11 ciphers.
*/
enum ieee80211_cipher {
IEEE80211_CIPHER_NONE = 0x00000000,
IEEE80211_CIPHER_USEGROUP = 0x00000001,
IEEE80211_CIPHER_WEP40 = 0x00000002,
IEEE80211_CIPHER_TKIP = 0x00000004,
IEEE80211_CIPHER_CCMP = 0x00000008,
IEEE80211_CIPHER_WEP104 = 0x00000010,
IEEE80211_CIPHER_BIP = 0x00000020 /* 11w */
};
/*
* 802.11 Authentication and Key Management Protocols.
*/
enum ieee80211_akm {
IEEE80211_AKM_NONE = 0x00000000,
IEEE80211_AKM_8021X = 0x00000001,
IEEE80211_AKM_PSK = 0x00000002,
IEEE80211_AKM_SHA256_8021X = 0x00000004, /* 11w */
IEEE80211_AKM_SHA256_PSK = 0x00000008 /* 11w */
};
#define IEEE80211_TKIP_HDRLEN 8
#define IEEE80211_TKIP_MICLEN 8
#define IEEE80211_TKIP_ICVLEN 4
#define IEEE80211_CCMP_HDRLEN 8
#define IEEE80211_CCMP_MICLEN 8
#define IEEE80211_PMK_LEN 32
#ifdef _KERNEL
static __inline int
ieee80211_is_8021x_akm(enum ieee80211_akm akm)
{
return akm == IEEE80211_AKM_8021X ||
akm == IEEE80211_AKM_SHA256_8021X;
}
static __inline int
ieee80211_is_sha256_akm(enum ieee80211_akm akm)
{
return akm == IEEE80211_AKM_SHA256_8021X ||
akm == IEEE80211_AKM_SHA256_PSK;
}
struct ieee80211_key {
u_int8_t k_id; /* identifier (0-5) */
enum ieee80211_cipher k_cipher;
u_int k_flags;
#define IEEE80211_KEY_GROUP 0x00000001 /* group data key */
#define IEEE80211_KEY_TX 0x00000002 /* Tx+Rx */
#define IEEE80211_KEY_IGTK 0x00000004 /* integrity group key */
#define IEEE80211_KEY_SWCRYPTO 0x00000080 /* loaded for software crypto */
u_int k_len;
u_int64_t k_rsc[IEEE80211_NUM_TID];
u_int64_t k_mgmt_rsc;
u_int64_t k_tsc;
u_int8_t k_key[32];
void *k_priv;
};
#define IEEE80211_KEYBUF_SIZE 16
/*
* Entry in the PMKSA cache.
*/
struct ieee80211_pmk {
enum ieee80211_akm pmk_akm;
u_int32_t pmk_lifetime;
#define IEEE80211_PMK_INFINITE 0
u_int8_t pmk_pmkid[IEEE80211_PMKID_LEN];
u_int8_t pmk_macaddr[IEEE80211_ADDR_LEN];
u_int8_t pmk_key[IEEE80211_PMK_LEN];
TAILQ_ENTRY(ieee80211_pmk) pmk_next;
};
/* forward references */
struct ieee80211com;
struct ieee80211_node;
void ieee80211_crypto_attach(struct ifnet *);
void ieee80211_crypto_detach(struct ifnet *);
void ieee80211_crypto_clear_groupkeys(struct ieee80211com *);
struct ieee80211_key *ieee80211_get_txkey(struct ieee80211com *,
const struct ieee80211_frame *, struct ieee80211_node *);
struct ieee80211_key *ieee80211_get_rxkey(struct ieee80211com *,
struct mbuf *, struct ieee80211_node *);
struct mbuf *ieee80211_encrypt(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
struct mbuf *ieee80211_decrypt(struct ieee80211com *, struct mbuf *,
struct ieee80211_node *);
int ieee80211_set_key(struct ieee80211com *, struct ieee80211_node *,
struct ieee80211_key *);
void ieee80211_delete_key(struct ieee80211com *, struct ieee80211_node *,
struct ieee80211_key *);
void ieee80211_eapol_key_mic(struct ieee80211_eapol_key *,
const u_int8_t *);
int ieee80211_eapol_key_check_mic(struct ieee80211_eapol_key *,
const u_int8_t *);
#ifndef IEEE80211_STA_ONLY
void ieee80211_eapol_key_encrypt(struct ieee80211com *,
struct ieee80211_eapol_key *, const u_int8_t *);
#endif
int ieee80211_eapol_key_decrypt(struct ieee80211_eapol_key *,
const u_int8_t *);
struct ieee80211_pmk *ieee80211_pmksa_add(struct ieee80211com *,
enum ieee80211_akm, const u_int8_t *, const u_int8_t *, u_int32_t);
struct ieee80211_pmk *ieee80211_pmksa_find(struct ieee80211com *,
struct ieee80211_node *, const u_int8_t *);
void ieee80211_derive_ptk(enum ieee80211_akm, const u_int8_t *,
const u_int8_t *, const u_int8_t *, const u_int8_t *,
const u_int8_t *, struct ieee80211_ptk *);
int ieee80211_cipher_keylen(enum ieee80211_cipher);
int ieee80211_wep_set_key(struct ieee80211com *, struct ieee80211_key *);
void ieee80211_wep_delete_key(struct ieee80211com *,
struct ieee80211_key *);
struct mbuf *ieee80211_wep_encrypt(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
struct mbuf *ieee80211_wep_decrypt(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
int ieee80211_tkip_set_key(struct ieee80211com *, struct ieee80211_key *);
void ieee80211_tkip_delete_key(struct ieee80211com *,
struct ieee80211_key *);
struct mbuf *ieee80211_tkip_encrypt(struct ieee80211com *,
struct mbuf *, struct ieee80211_key *);
int ieee80211_tkip_get_tsc(uint64_t *, uint64_t **, struct mbuf *,
struct ieee80211_key *);
struct mbuf *ieee80211_tkip_decrypt(struct ieee80211com *,
struct mbuf *, struct ieee80211_key *);
void ieee80211_tkip_mic(struct mbuf *, int, const u_int8_t *,
u_int8_t[IEEE80211_TKIP_MICLEN]);
void ieee80211_michael_mic_failure(struct ieee80211com *, u_int64_t);
#ifndef IEEE80211_STA_ONLY
void ieee80211_michael_mic_failure_timeout(void *);
#endif
int ieee80211_ccmp_set_key(struct ieee80211com *, struct ieee80211_key *);
void ieee80211_ccmp_delete_key(struct ieee80211com *,
struct ieee80211_key *);
struct mbuf *ieee80211_ccmp_encrypt(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
int ieee80211_ccmp_get_pn(uint64_t *, uint64_t **, struct mbuf *,
struct ieee80211_key *);
struct mbuf *ieee80211_ccmp_decrypt(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
int ieee80211_bip_set_key(struct ieee80211com *, struct ieee80211_key *);
void ieee80211_bip_delete_key(struct ieee80211com *,
struct ieee80211_key *);
struct mbuf *ieee80211_bip_encap(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
struct mbuf *ieee80211_bip_decap(struct ieee80211com *, struct mbuf *,
struct ieee80211_key *);
#endif /* _KERNEL */
#endif /* _NET80211_IEEE80211_CRYPTO_H_ */
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