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Diffstat (limited to 'package/network/services/hostapd/madwifi/net80211/ieee80211_crypto.h')
| -rw-r--r-- | package/network/services/hostapd/madwifi/net80211/ieee80211_crypto.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/package/network/services/hostapd/madwifi/net80211/ieee80211_crypto.h b/package/network/services/hostapd/madwifi/net80211/ieee80211_crypto.h new file mode 100644 index 0000000000..b34f359d0e --- /dev/null +++ b/package/network/services/hostapd/madwifi/net80211/ieee80211_crypto.h @@ -0,0 +1,207 @@ +/*- + * Copyright (c) 2001 Atsushi Onoe + * Copyright (c) 2002-2005 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * 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. + * + * $Id: ieee80211_crypto.h 3068 2007-12-21 17:46:02Z mentor $ + */ +#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 */ +#define IEEE80211_TID_SIZE 17 /* total number of TIDs */ + +/* + * Old WEP-style key. Deprecated. + */ +struct ieee80211_wepkey { + u_int wk_len; /* key length in bytes */ + u_int8_t wk_key[IEEE80211_KEYBUF_SIZE]; +}; + +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 u_int16_t ieee80211_keyix_t; + +/* XXX pack better? */ +/* XXX 48-bit rsc/tsc */ +struct ieee80211_key { + u_int8_t wk_keylen; /* key length in bytes */ + u_int8_t wk_flags; +#define IEEE80211_KEY_XMIT 0x01 /* key used for xmit */ +#define IEEE80211_KEY_RECV 0x02 /* key used for recv */ +#define IEEE80211_KEY_GROUP 0x04 /* key used for WPA group operation */ +#define IEEE80211_KEY_SWCRYPT 0x10 /* host-based encrypt/decrypt */ +#define IEEE80211_KEY_SWMIC 0x20 /* host-based enmic/demic */ + ieee80211_keyix_t wk_keyix; /* key index */ + u_int8_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 */ + u_int64_t wk_keyrsc[IEEE80211_TID_SIZE]; /* key receive sequence counter */ + u_int64_t wk_keytsc; /* key transmit sequence counter */ + const struct ieee80211_cipher *wk_cipher; + void *wk_private; /* private cipher state */ +}; +#define IEEE80211_KEY_COMMON /* common flags passed in by apps */\ + (IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV | IEEE80211_KEY_GROUP) + +/* + * NB: these values are ordered carefully; there are lots of + * of implications in any reordering. In particular beware + * that 4 is not used to avoid conflicting with IEEE80211_F_PRIVACY. + */ +#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_CKIP 5 +#define IEEE80211_CIPHER_NONE 6 /* pseudo value */ + +#define IEEE80211_CIPHER_MAX (IEEE80211_CIPHER_NONE + 1) + +#define IEEE80211_KEYIX_NONE ((ieee80211_keyix_t)-1) + +#if defined(__KERNEL__) || defined(_KERNEL) + +struct ieee80211com; +struct ieee80211vap; +struct ieee80211_node; +struct sk_buff; + +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, int, + struct ieee80211_key *); +int ieee80211_crypto_delkey(struct ieee80211vap *, struct ieee80211_key *, + struct ieee80211_node *); +int ieee80211_crypto_setkey(struct ieee80211vap *, struct ieee80211_key *, + const u_int8_t macaddr[IEEE80211_ADDR_LEN], struct ieee80211_node *); +void ieee80211_crypto_delglobalkeys(struct ieee80211vap *); + +/* + * 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 *); + int (*ic_encap)(struct ieee80211_key *, struct sk_buff *, u_int8_t); + int (*ic_decap)(struct ieee80211_key *, struct sk_buff *, int); + int (*ic_enmic)(struct ieee80211_key *, struct sk_buff *, int); + int (*ic_demic)(struct ieee80211_key *, struct sk_buff *, int, int); +}; +extern const struct ieee80211_cipher ieee80211_cipher_none; + +void ieee80211_crypto_register(const struct ieee80211_cipher *); +void ieee80211_crypto_unregister(const struct ieee80211_cipher *); +int ieee80211_crypto_available(struct ieee80211vap*, u_int); + +struct ieee80211_key *ieee80211_crypto_encap(struct ieee80211_node *, + struct sk_buff *); +struct ieee80211_key *ieee80211_crypto_decap(struct ieee80211_node *, + struct sk_buff *, int); + +/* + * Check and remove any MIC. + */ +static __inline int +ieee80211_crypto_demic(struct ieee80211vap *vap, struct ieee80211_key *k, + struct sk_buff *skb, int hdrlen, int force) +{ + const struct ieee80211_cipher *cip = k->wk_cipher; + return (cip->ic_miclen > 0 ? cip->ic_demic(k, skb, hdrlen, force) : 1); +} + +/* + * Add any MIC. + */ +static __inline int +ieee80211_crypto_enmic(struct ieee80211vap *vap, struct ieee80211_key *k, + struct sk_buff *skb, int force) +{ + const struct ieee80211_cipher *cip = k->wk_cipher; + return (cip->ic_miclen > 0 ? cip->ic_enmic(k, skb, force) : 1); +} + +/* + * Reset key state to an unused state. The crypto + * key allocation mechanism ensures 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_t ix) +{ + k->wk_cipher = &ieee80211_cipher_none;; + k->wk_private = k->wk_cipher->ic_attach(vap, k); + k->wk_keyix = ix; + k->wk_flags = IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV; +} + +/* + * Crypto-related notification methods. + */ +void ieee80211_notify_replay_failure(struct ieee80211vap *, + const struct ieee80211_frame *, const struct ieee80211_key *, + u_int64_t rsc); +void ieee80211_notify_michael_failure(struct ieee80211vap *, + const struct ieee80211_frame *, ieee80211_keyix_t keyix); +#endif /* defined(__KERNEL__) || defined(_KERNEL) */ +#endif /* _NET80211_IEEE80211_CRYPTO_H_ */ |