The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_crypto.h

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    1 /*      $OpenBSD: ieee80211_crypto.h,v 1.27 2020/05/15 14:21:09 stsp Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 2007,2008 Damien Bergamini <damien.bergamini@free.fr>
    5  *
    6  * Permission to use, copy, modify, and distribute this software for any
    7  * purpose with or without fee is hereby granted, provided that the above
    8  * copyright notice and this permission notice appear in all copies.
    9  *
   10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   17  */
   18 
   19 #ifndef _NET80211_IEEE80211_CRYPTO_H_
   20 #define _NET80211_IEEE80211_CRYPTO_H_
   21 
   22 /*
   23  * 802.11 protocol crypto-related definitions.
   24  */
   25 
   26 /*
   27  * 802.11 ciphers.
   28  */
   29 enum ieee80211_cipher {
   30         IEEE80211_CIPHER_NONE           = 0x00000000,
   31         IEEE80211_CIPHER_USEGROUP       = 0x00000001,
   32         IEEE80211_CIPHER_WEP40          = 0x00000002,
   33         IEEE80211_CIPHER_TKIP           = 0x00000004,
   34         IEEE80211_CIPHER_CCMP           = 0x00000008,
   35         IEEE80211_CIPHER_WEP104         = 0x00000010,
   36         IEEE80211_CIPHER_BIP            = 0x00000020    /* 11w */
   37 };
   38 
   39 /*
   40  * 802.11 Authentication and Key Management Protocols.
   41  */
   42 enum ieee80211_akm {
   43         IEEE80211_AKM_NONE              = 0x00000000,
   44         IEEE80211_AKM_8021X             = 0x00000001,
   45         IEEE80211_AKM_PSK               = 0x00000002,
   46         IEEE80211_AKM_SHA256_8021X      = 0x00000004,   /* 11w */
   47         IEEE80211_AKM_SHA256_PSK        = 0x00000008    /* 11w */
   48 };
   49 
   50 #define IEEE80211_TKIP_HDRLEN   8
   51 #define IEEE80211_TKIP_MICLEN   8
   52 #define IEEE80211_TKIP_ICVLEN   4
   53 #define IEEE80211_CCMP_HDRLEN   8
   54 #define IEEE80211_CCMP_MICLEN   8
   55 
   56 #define IEEE80211_PMK_LEN       32
   57 
   58 #ifdef _KERNEL 
   59 
   60 static __inline int
   61 ieee80211_is_8021x_akm(enum ieee80211_akm akm)
   62 {
   63         return akm == IEEE80211_AKM_8021X ||
   64             akm == IEEE80211_AKM_SHA256_8021X;
   65 }
   66 
   67 static __inline int
   68 ieee80211_is_sha256_akm(enum ieee80211_akm akm)
   69 {
   70         return akm == IEEE80211_AKM_SHA256_8021X ||
   71             akm == IEEE80211_AKM_SHA256_PSK;
   72 }
   73 
   74 struct ieee80211_key {
   75         u_int8_t                k_id;           /* identifier (0-5) */
   76         enum ieee80211_cipher   k_cipher;
   77         u_int                   k_flags;
   78 #define IEEE80211_KEY_GROUP     0x00000001      /* group data key */
   79 #define IEEE80211_KEY_TX        0x00000002      /* Tx+Rx */
   80 #define IEEE80211_KEY_IGTK      0x00000004      /* integrity group key */
   81 #define IEEE80211_KEY_SWCRYPTO  0x00000080      /* loaded for software crypto */
   82 
   83         u_int                   k_len;
   84         u_int64_t               k_rsc[IEEE80211_NUM_TID];
   85         u_int64_t               k_mgmt_rsc;
   86         u_int64_t               k_tsc;
   87         u_int8_t                k_key[32];
   88         void                    *k_priv;
   89 };
   90 
   91 #define IEEE80211_KEYBUF_SIZE   16
   92 
   93 /*
   94  * Entry in the PMKSA cache.
   95  */
   96 struct ieee80211_pmk {
   97         enum ieee80211_akm      pmk_akm;
   98         u_int32_t               pmk_lifetime;
   99 #define IEEE80211_PMK_INFINITE  0
  100 
  101         u_int8_t                pmk_pmkid[IEEE80211_PMKID_LEN];
  102         u_int8_t                pmk_macaddr[IEEE80211_ADDR_LEN];
  103         u_int8_t                pmk_key[IEEE80211_PMK_LEN];
  104 
  105         TAILQ_ENTRY(ieee80211_pmk) pmk_next;
  106 };
  107 
  108 /* forward references */
  109 struct  ieee80211com;
  110 struct  ieee80211_node;
  111 
  112 void    ieee80211_crypto_attach(struct ifnet *);
  113 void    ieee80211_crypto_detach(struct ifnet *);
  114 
  115 void    ieee80211_crypto_clear_groupkeys(struct ieee80211com *);
  116 struct  ieee80211_key *ieee80211_get_txkey(struct ieee80211com *,
  117             const struct ieee80211_frame *, struct ieee80211_node *);
  118 struct  ieee80211_key *ieee80211_get_rxkey(struct ieee80211com *,
  119             struct mbuf *, struct ieee80211_node *);
  120 struct  mbuf *ieee80211_encrypt(struct ieee80211com *, struct mbuf *,
  121             struct ieee80211_key *);
  122 struct  mbuf *ieee80211_decrypt(struct ieee80211com *, struct mbuf *,
  123             struct ieee80211_node *);
  124 
  125 int     ieee80211_set_key(struct ieee80211com *, struct ieee80211_node *,
  126             struct ieee80211_key *);
  127 void    ieee80211_delete_key(struct ieee80211com *, struct ieee80211_node *,
  128             struct ieee80211_key *);
  129 
  130 void    ieee80211_eapol_key_mic(struct ieee80211_eapol_key *,
  131             const u_int8_t *);
  132 int     ieee80211_eapol_key_check_mic(struct ieee80211_eapol_key *,
  133             const u_int8_t *);
  134 #ifndef IEEE80211_STA_ONLY
  135 void    ieee80211_eapol_key_encrypt(struct ieee80211com *,
  136             struct ieee80211_eapol_key *, const u_int8_t *);
  137 #endif
  138 int     ieee80211_eapol_key_decrypt(struct ieee80211_eapol_key *,
  139             const u_int8_t *);
  140 
  141 struct  ieee80211_pmk *ieee80211_pmksa_add(struct ieee80211com *,
  142             enum ieee80211_akm, const u_int8_t *, const u_int8_t *, u_int32_t);
  143 struct  ieee80211_pmk *ieee80211_pmksa_find(struct ieee80211com *,
  144             struct ieee80211_node *, const u_int8_t *);
  145 void    ieee80211_derive_ptk(enum ieee80211_akm, const u_int8_t *,
  146             const u_int8_t *, const u_int8_t *, const u_int8_t *,
  147             const u_int8_t *, struct ieee80211_ptk *);
  148 int     ieee80211_cipher_keylen(enum ieee80211_cipher);
  149 
  150 int     ieee80211_wep_set_key(struct ieee80211com *, struct ieee80211_key *);
  151 void    ieee80211_wep_delete_key(struct ieee80211com *,
  152             struct ieee80211_key *);
  153 struct  mbuf *ieee80211_wep_encrypt(struct ieee80211com *, struct mbuf *,
  154             struct ieee80211_key *);
  155 struct  mbuf *ieee80211_wep_decrypt(struct ieee80211com *, struct mbuf *,
  156             struct ieee80211_key *);
  157 
  158 int     ieee80211_tkip_set_key(struct ieee80211com *, struct ieee80211_key *);
  159 void    ieee80211_tkip_delete_key(struct ieee80211com *,
  160             struct ieee80211_key *);
  161 struct  mbuf *ieee80211_tkip_encrypt(struct ieee80211com *,
  162             struct mbuf *, struct ieee80211_key *);
  163 int     ieee80211_tkip_get_tsc(uint64_t *, uint64_t **, struct mbuf *,
  164             struct ieee80211_key *);
  165 struct  mbuf *ieee80211_tkip_decrypt(struct ieee80211com *,
  166             struct mbuf *, struct ieee80211_key *);
  167 void    ieee80211_tkip_mic(struct mbuf *, int, const u_int8_t *,
  168             u_int8_t[IEEE80211_TKIP_MICLEN]);
  169 void    ieee80211_michael_mic_failure(struct ieee80211com *, u_int64_t);
  170 #ifndef IEEE80211_STA_ONLY
  171 void    ieee80211_michael_mic_failure_timeout(void *);
  172 #endif
  173 
  174 int     ieee80211_ccmp_set_key(struct ieee80211com *, struct ieee80211_key *);
  175 void    ieee80211_ccmp_delete_key(struct ieee80211com *,
  176             struct ieee80211_key *);
  177 struct  mbuf *ieee80211_ccmp_encrypt(struct ieee80211com *, struct mbuf *,
  178             struct ieee80211_key *);
  179 int     ieee80211_ccmp_get_pn(uint64_t *, uint64_t **, struct mbuf *,
  180             struct ieee80211_key *);
  181 struct  mbuf *ieee80211_ccmp_decrypt(struct ieee80211com *, struct mbuf *,
  182             struct ieee80211_key *);
  183 
  184 int     ieee80211_bip_set_key(struct ieee80211com *, struct ieee80211_key *);
  185 void    ieee80211_bip_delete_key(struct ieee80211com *,
  186             struct ieee80211_key *);
  187 struct  mbuf *ieee80211_bip_encap(struct ieee80211com *, struct mbuf *,
  188             struct ieee80211_key *);
  189 struct  mbuf *ieee80211_bip_decap(struct ieee80211com *, struct mbuf *,
  190             struct ieee80211_key *);
  191 
  192 #endif /* _KERNEL */
  193 #endif /* _NET80211_IEEE80211_CRYPTO_H_ */

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