1 /* $OpenBSD: ieee80211_crypto.h,v 1.21 2008/09/27 15:16:09 damien 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_AES128_CMAC = 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 static __inline int
51 ieee80211_is_8021x_akm(enum ieee80211_akm akm)
52 {
53 return akm == IEEE80211_AKM_8021X ||
54 akm == IEEE80211_AKM_SHA256_8021X;
55 }
56
57 static __inline int
58 ieee80211_is_sha256_akm(enum ieee80211_akm akm)
59 {
60 return akm == IEEE80211_AKM_SHA256_8021X ||
61 akm == IEEE80211_AKM_SHA256_PSK;
62 }
63
64 #define IEEE80211_KEYBUF_SIZE 16
65
66 #define IEEE80211_TKIP_HDRLEN 8
67 #define IEEE80211_TKIP_MICLEN 8
68 #define IEEE80211_TKIP_ICVLEN 4
69 #define IEEE80211_CCMP_HDRLEN 8
70 #define IEEE80211_CCMP_MICLEN 8
71
72 #define IEEE80211_PMK_LEN 32
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
82 u_int k_len;
83 u_int64_t k_rsc[IEEE80211_NUM_TID];
84 u_int64_t k_mgmt_rsc;
85 u_int64_t k_tsc;
86 u_int8_t k_key[32];
87 void *k_priv;
88 };
89
90 /*
91 * Entry in the PMKSA cache.
92 */
93 struct ieee80211_pmk {
94 enum ieee80211_akm pmk_akm;
95 u_int32_t pmk_lifetime;
96 #define IEEE80211_PMK_INFINITE 0
97
98 u_int8_t pmk_pmkid[IEEE80211_PMKID_LEN];
99 u_int8_t pmk_macaddr[IEEE80211_ADDR_LEN];
100 u_int8_t pmk_key[IEEE80211_PMK_LEN];
101
102 TAILQ_ENTRY(ieee80211_pmk) pmk_next;
103 };
104
105 /* forward references */
106 struct ieee80211com;
107 struct ieee80211_node;
108
109 void ieee80211_crypto_attach(struct ifnet *);
110 void ieee80211_crypto_detach(struct ifnet *);
111
112 struct ieee80211_key *ieee80211_get_txkey(struct ieee80211com *,
113 const struct ieee80211_frame *, struct ieee80211_node *);
114 struct ieee80211_key *ieee80211_get_rxkey(struct ieee80211com *,
115 struct mbuf *, struct ieee80211_node *);
116 struct mbuf *ieee80211_encrypt(struct ieee80211com *, struct mbuf *,
117 struct ieee80211_key *);
118 struct mbuf *ieee80211_decrypt(struct ieee80211com *, struct mbuf *,
119 struct ieee80211_node *);
120
121 int ieee80211_set_key(struct ieee80211com *, struct ieee80211_node *,
122 struct ieee80211_key *);
123 void ieee80211_delete_key(struct ieee80211com *, struct ieee80211_node *,
124 struct ieee80211_key *);
125
126 void ieee80211_eapol_key_mic(struct ieee80211_eapol_key *,
127 const u_int8_t *);
128 int ieee80211_eapol_key_check_mic(struct ieee80211_eapol_key *,
129 const u_int8_t *);
130 #ifndef IEEE80211_STA_ONLY
131 void ieee80211_eapol_key_encrypt(struct ieee80211com *,
132 struct ieee80211_eapol_key *, const u_int8_t *);
133 #endif
134 int ieee80211_eapol_key_decrypt(struct ieee80211_eapol_key *,
135 const u_int8_t *);
136
137 struct ieee80211_pmk *ieee80211_pmksa_add(struct ieee80211com *,
138 enum ieee80211_akm, const u_int8_t *, const u_int8_t *, u_int32_t);
139 struct ieee80211_pmk *ieee80211_pmksa_find(struct ieee80211com *,
140 struct ieee80211_node *, const u_int8_t *);
141 void ieee80211_derive_ptk(enum ieee80211_akm, const u_int8_t *,
142 const u_int8_t *, const u_int8_t *, const u_int8_t *,
143 const u_int8_t *, struct ieee80211_ptk *);
144 int ieee80211_cipher_keylen(enum ieee80211_cipher);
145
146 int ieee80211_wep_set_key(struct ieee80211com *, struct ieee80211_key *);
147 void ieee80211_wep_delete_key(struct ieee80211com *,
148 struct ieee80211_key *);
149 struct mbuf *ieee80211_wep_encrypt(struct ieee80211com *, struct mbuf *,
150 struct ieee80211_key *);
151 struct mbuf *ieee80211_wep_decrypt(struct ieee80211com *, struct mbuf *,
152 struct ieee80211_key *);
153
154 int ieee80211_tkip_set_key(struct ieee80211com *, struct ieee80211_key *);
155 void ieee80211_tkip_delete_key(struct ieee80211com *,
156 struct ieee80211_key *);
157 struct mbuf *ieee80211_tkip_encrypt(struct ieee80211com *,
158 struct mbuf *, struct ieee80211_key *);
159 struct mbuf *ieee80211_tkip_decrypt(struct ieee80211com *,
160 struct mbuf *, struct ieee80211_key *);
161 void ieee80211_tkip_mic(struct mbuf *, int, const u_int8_t *,
162 u_int8_t[IEEE80211_TKIP_MICLEN]);
163 void ieee80211_michael_mic_failure(struct ieee80211com *, u_int64_t);
164
165 int ieee80211_ccmp_set_key(struct ieee80211com *, struct ieee80211_key *);
166 void ieee80211_ccmp_delete_key(struct ieee80211com *,
167 struct ieee80211_key *);
168 struct mbuf *ieee80211_ccmp_encrypt(struct ieee80211com *, struct mbuf *,
169 struct ieee80211_key *);
170 struct mbuf *ieee80211_ccmp_decrypt(struct ieee80211com *, struct mbuf *,
171 struct ieee80211_key *);
172
173 int ieee80211_bip_set_key(struct ieee80211com *, struct ieee80211_key *);
174 void ieee80211_bip_delete_key(struct ieee80211com *,
175 struct ieee80211_key *);
176 struct mbuf *ieee80211_bip_encap(struct ieee80211com *, struct mbuf *,
177 struct ieee80211_key *);
178 struct mbuf *ieee80211_bip_decap(struct ieee80211com *, struct mbuf *,
179 struct ieee80211_key *);
180
181 #endif /* _NET80211_IEEE80211_CRYPTO_H_ */
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