15395998e9
Submitted by: <s3erios@gmail.com> Differential Revision: https://reviews.freebsd.org/D3639
252 lines
9.8 KiB
C
252 lines
9.8 KiB
C
/*-
|
|
* Copyright (c) 2001 Atsushi Onoe
|
|
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#ifndef _NET80211_IEEE80211_CRYPTO_H_
|
|
#define _NET80211_IEEE80211_CRYPTO_H_
|
|
|
|
/*
|
|
* 802.11 protocol crypto-related definitions.
|
|
*/
|
|
#define IEEE80211_KEYBUF_SIZE 16
|
|
#define IEEE80211_MICBUF_SIZE (8+8) /* space for both tx+rx keys */
|
|
|
|
/*
|
|
* Old WEP-style key. Deprecated.
|
|
*/
|
|
struct ieee80211_wepkey {
|
|
u_int wk_len; /* key length in bytes */
|
|
uint8_t wk_key[IEEE80211_KEYBUF_SIZE];
|
|
};
|
|
|
|
struct ieee80211_rsnparms {
|
|
uint8_t rsn_mcastcipher; /* mcast/group cipher */
|
|
uint8_t rsn_mcastkeylen; /* mcast key length */
|
|
uint8_t rsn_ucastcipher; /* selected unicast cipher */
|
|
uint8_t rsn_ucastkeylen; /* unicast key length */
|
|
uint8_t rsn_keymgmt; /* selected key mgmt algo */
|
|
uint16_t rsn_caps; /* capabilities */
|
|
};
|
|
|
|
struct ieee80211_cipher;
|
|
|
|
/*
|
|
* Crypto key state. There is sufficient room for all supported
|
|
* ciphers (see below). The underlying ciphers are handled
|
|
* separately through loadable cipher modules that register with
|
|
* the generic crypto support. A key has a reference to an instance
|
|
* of the cipher; any per-key state is hung off wk_private by the
|
|
* cipher when it is attached. Ciphers are automatically called
|
|
* to detach and cleanup any such state when the key is deleted.
|
|
*
|
|
* The generic crypto support handles encap/decap of cipher-related
|
|
* frame contents for both hardware- and software-based implementations.
|
|
* A key requiring software crypto support is automatically flagged and
|
|
* the cipher is expected to honor this and do the necessary work.
|
|
* Ciphers such as TKIP may also support mixed hardware/software
|
|
* encrypt/decrypt and MIC processing.
|
|
*/
|
|
typedef uint16_t ieee80211_keyix; /* h/w key index */
|
|
|
|
struct ieee80211_key {
|
|
uint8_t wk_keylen; /* key length in bytes */
|
|
uint8_t wk_pad;
|
|
uint16_t wk_flags;
|
|
#define IEEE80211_KEY_XMIT 0x0001 /* key used for xmit */
|
|
#define IEEE80211_KEY_RECV 0x0002 /* key used for recv */
|
|
#define IEEE80211_KEY_GROUP 0x0004 /* key used for WPA group operation */
|
|
#define IEEE80211_KEY_NOREPLAY 0x0008 /* ignore replay failures */
|
|
#define IEEE80211_KEY_SWENCRYPT 0x0010 /* host-based encrypt */
|
|
#define IEEE80211_KEY_SWDECRYPT 0x0020 /* host-based decrypt */
|
|
#define IEEE80211_KEY_SWENMIC 0x0040 /* host-based enmic */
|
|
#define IEEE80211_KEY_SWDEMIC 0x0080 /* host-based demic */
|
|
#define IEEE80211_KEY_DEVKEY 0x0100 /* device key request completed */
|
|
#define IEEE80211_KEY_CIPHER0 0x1000 /* cipher-specific action 0 */
|
|
#define IEEE80211_KEY_CIPHER1 0x2000 /* cipher-specific action 1 */
|
|
ieee80211_keyix wk_keyix; /* h/w key index */
|
|
ieee80211_keyix wk_rxkeyix; /* optional h/w rx key index */
|
|
uint8_t wk_key[IEEE80211_KEYBUF_SIZE+IEEE80211_MICBUF_SIZE];
|
|
#define wk_txmic wk_key+IEEE80211_KEYBUF_SIZE+0 /* XXX can't () right */
|
|
#define wk_rxmic wk_key+IEEE80211_KEYBUF_SIZE+8 /* XXX can't () right */
|
|
/* key receive sequence counter */
|
|
uint64_t wk_keyrsc[IEEE80211_TID_SIZE];
|
|
uint64_t wk_keytsc; /* key transmit sequence counter */
|
|
const struct ieee80211_cipher *wk_cipher;
|
|
void *wk_private; /* private cipher state */
|
|
uint8_t wk_macaddr[IEEE80211_ADDR_LEN];
|
|
};
|
|
#define IEEE80211_KEY_COMMON /* common flags passed in by apps */\
|
|
(IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV | IEEE80211_KEY_GROUP | \
|
|
IEEE80211_KEY_NOREPLAY)
|
|
#define IEEE80211_KEY_DEVICE /* flags owned by device driver */\
|
|
(IEEE80211_KEY_DEVKEY|IEEE80211_KEY_CIPHER0|IEEE80211_KEY_CIPHER1)
|
|
|
|
#define IEEE80211_KEY_SWCRYPT \
|
|
(IEEE80211_KEY_SWENCRYPT | IEEE80211_KEY_SWDECRYPT)
|
|
#define IEEE80211_KEY_SWMIC (IEEE80211_KEY_SWENMIC | IEEE80211_KEY_SWDEMIC)
|
|
|
|
#define IEEE80211_KEY_BITS \
|
|
"\20\1XMIT\2RECV\3GROUP\4SWENCRYPT\5SWDECRYPT\6SWENMIC\7SWDEMIC" \
|
|
"\10DEVKEY\11CIPHER0\12CIPHER1"
|
|
|
|
#define IEEE80211_KEYIX_NONE ((ieee80211_keyix) -1)
|
|
|
|
/*
|
|
* NB: these values are ordered carefully; there are lots of
|
|
* of implications in any reordering. Beware that 4 is used
|
|
* only to indicate h/w TKIP MIC support in driver capabilities;
|
|
* there is no separate cipher support (it's rolled into the
|
|
* TKIP cipher support).
|
|
*/
|
|
#define IEEE80211_CIPHER_WEP 0
|
|
#define IEEE80211_CIPHER_TKIP 1
|
|
#define IEEE80211_CIPHER_AES_OCB 2
|
|
#define IEEE80211_CIPHER_AES_CCM 3
|
|
#define IEEE80211_CIPHER_TKIPMIC 4 /* TKIP MIC capability */
|
|
#define IEEE80211_CIPHER_CKIP 5
|
|
#define IEEE80211_CIPHER_NONE 6 /* pseudo value */
|
|
|
|
#define IEEE80211_CIPHER_MAX (IEEE80211_CIPHER_NONE+1)
|
|
|
|
/* capability bits in ic_cryptocaps/iv_cryptocaps */
|
|
#define IEEE80211_CRYPTO_WEP (1<<IEEE80211_CIPHER_WEP)
|
|
#define IEEE80211_CRYPTO_TKIP (1<<IEEE80211_CIPHER_TKIP)
|
|
#define IEEE80211_CRYPTO_AES_OCB (1<<IEEE80211_CIPHER_AES_OCB)
|
|
#define IEEE80211_CRYPTO_AES_CCM (1<<IEEE80211_CIPHER_AES_CCM)
|
|
#define IEEE80211_CRYPTO_TKIPMIC (1<<IEEE80211_CIPHER_TKIPMIC)
|
|
#define IEEE80211_CRYPTO_CKIP (1<<IEEE80211_CIPHER_CKIP)
|
|
|
|
#define IEEE80211_CRYPTO_BITS \
|
|
"\20\1WEP\2TKIP\3AES\4AES_CCM\5TKIPMIC\6CKIP"
|
|
|
|
#if defined(__KERNEL__) || defined(_KERNEL)
|
|
|
|
struct ieee80211com;
|
|
struct ieee80211vap;
|
|
struct ieee80211_node;
|
|
struct mbuf;
|
|
|
|
MALLOC_DECLARE(M_80211_CRYPTO);
|
|
|
|
void ieee80211_crypto_attach(struct ieee80211com *);
|
|
void ieee80211_crypto_detach(struct ieee80211com *);
|
|
void ieee80211_crypto_vattach(struct ieee80211vap *);
|
|
void ieee80211_crypto_vdetach(struct ieee80211vap *);
|
|
int ieee80211_crypto_newkey(struct ieee80211vap *,
|
|
int cipher, int flags, struct ieee80211_key *);
|
|
int ieee80211_crypto_delkey(struct ieee80211vap *,
|
|
struct ieee80211_key *);
|
|
int ieee80211_crypto_setkey(struct ieee80211vap *, struct ieee80211_key *);
|
|
void ieee80211_crypto_delglobalkeys(struct ieee80211vap *);
|
|
void ieee80211_crypto_reload_keys(struct ieee80211com *);
|
|
|
|
/*
|
|
* Template for a supported cipher. Ciphers register with the
|
|
* crypto code and are typically loaded as separate modules
|
|
* (the null cipher is always present).
|
|
* XXX may need refcnts
|
|
*/
|
|
struct ieee80211_cipher {
|
|
const char *ic_name; /* printable name */
|
|
u_int ic_cipher; /* IEEE80211_CIPHER_* */
|
|
u_int ic_header; /* size of privacy header (bytes) */
|
|
u_int ic_trailer; /* size of privacy trailer (bytes) */
|
|
u_int ic_miclen; /* size of mic trailer (bytes) */
|
|
void* (*ic_attach)(struct ieee80211vap *, struct ieee80211_key *);
|
|
void (*ic_detach)(struct ieee80211_key *);
|
|
int (*ic_setkey)(struct ieee80211_key *);
|
|
void (*ic_setiv)(struct ieee80211_key *, uint8_t *);
|
|
int (*ic_encap)(struct ieee80211_key *, struct mbuf *);
|
|
int (*ic_decap)(struct ieee80211_key *, struct mbuf *, int);
|
|
int (*ic_enmic)(struct ieee80211_key *, struct mbuf *, int);
|
|
int (*ic_demic)(struct ieee80211_key *, struct mbuf *, int);
|
|
};
|
|
extern const struct ieee80211_cipher ieee80211_cipher_none;
|
|
|
|
#define IEEE80211_KEY_UNDEFINED(k) \
|
|
((k)->wk_cipher == &ieee80211_cipher_none)
|
|
|
|
void ieee80211_crypto_register(const struct ieee80211_cipher *);
|
|
void ieee80211_crypto_unregister(const struct ieee80211_cipher *);
|
|
int ieee80211_crypto_available(u_int cipher);
|
|
|
|
uint8_t ieee80211_crypto_get_keyid(struct ieee80211vap *vap,
|
|
struct ieee80211_key *k);
|
|
struct ieee80211_key *ieee80211_crypto_get_txkey(struct ieee80211_node *,
|
|
struct mbuf *);
|
|
struct ieee80211_key *ieee80211_crypto_encap(struct ieee80211_node *,
|
|
struct mbuf *);
|
|
struct ieee80211_key *ieee80211_crypto_decap(struct ieee80211_node *,
|
|
struct mbuf *, int);
|
|
|
|
/*
|
|
* Check and remove any MIC.
|
|
*/
|
|
static __inline int
|
|
ieee80211_crypto_demic(struct ieee80211vap *vap, struct ieee80211_key *k,
|
|
struct mbuf *m, int force)
|
|
{
|
|
const struct ieee80211_cipher *cip = k->wk_cipher;
|
|
return (cip->ic_miclen > 0 ? cip->ic_demic(k, m, force) : 1);
|
|
}
|
|
|
|
/*
|
|
* Add any MIC.
|
|
*/
|
|
static __inline int
|
|
ieee80211_crypto_enmic(struct ieee80211vap *vap,
|
|
struct ieee80211_key *k, struct mbuf *m, int force)
|
|
{
|
|
const struct ieee80211_cipher *cip = k->wk_cipher;
|
|
return (cip->ic_miclen > 0 ? cip->ic_enmic(k, m, force) : 1);
|
|
}
|
|
|
|
/*
|
|
* Reset key state to an unused state. The crypto
|
|
* key allocation mechanism insures other state (e.g.
|
|
* key data) is properly setup before a key is used.
|
|
*/
|
|
static __inline void
|
|
ieee80211_crypto_resetkey(struct ieee80211vap *vap,
|
|
struct ieee80211_key *k, ieee80211_keyix ix)
|
|
{
|
|
k->wk_cipher = &ieee80211_cipher_none;
|
|
k->wk_private = k->wk_cipher->ic_attach(vap, k);
|
|
k->wk_keyix = k->wk_rxkeyix = ix;
|
|
k->wk_flags = IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV;
|
|
}
|
|
|
|
/*
|
|
* Crypt-related notification methods.
|
|
*/
|
|
void ieee80211_notify_replay_failure(struct ieee80211vap *,
|
|
const struct ieee80211_frame *, const struct ieee80211_key *,
|
|
uint64_t rsc, int tid);
|
|
void ieee80211_notify_michael_failure(struct ieee80211vap *,
|
|
const struct ieee80211_frame *, u_int keyix);
|
|
#endif /* defined(__KERNEL__) || defined(_KERNEL) */
|
|
#endif /* _NET80211_IEEE80211_CRYPTO_H_ */
|