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Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * Copyright 2002-2004, Instant802 Networks, Inc.
3 * Copyright 2005, Devicescape Software, Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#ifndef IEEE80211_KEY_H
11#define IEEE80211_KEY_H
12
13#include <linux/types.h>
Johannes Berg8f371712007-08-28 17:01:54 -040014#include <linux/list.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070015#include <linux/crypto.h>
Johannes Bergdb4d1162008-02-25 16:27:45 +010016#include <linux/rcupdate.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070017#include <net/mac80211.h>
18
Johannes Berge31b8212010-10-05 19:39:30 +020019#define NUM_DEFAULT_KEYS 4
20#define NUM_DEFAULT_MGMT_KEYS 2
21
Johannes Berg11a843b2007-08-28 17:01:55 -040022struct ieee80211_local;
23struct ieee80211_sub_if_data;
24struct sta_info;
25
Johannes Bergdb4d1162008-02-25 16:27:45 +010026/**
27 * enum ieee80211_internal_key_flags - internal key flags
28 *
29 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
30 * in the hardware for TX crypto hardware acceleration.
Johannes Berg95acac62011-07-12 12:30:59 +020031 * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
Cedric Izoardc7ef38e2015-03-17 10:47:33 +000032 * @KEY_FLAG_CIPHER_SCHEME: This key is for a hardware cipher scheme
Johannes Bergdb4d1162008-02-25 16:27:45 +010033 */
34enum ieee80211_internal_key_flags {
35 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
Johannes Berg95acac62011-07-12 12:30:59 +020036 KEY_FLAG_TAINTED = BIT(1),
Cedric Izoardc7ef38e2015-03-17 10:47:33 +000037 KEY_FLAG_CIPHER_SCHEME = BIT(2),
Johannes Bergdb4d1162008-02-25 16:27:45 +010038};
Johannes Berg11a843b2007-08-28 17:01:55 -040039
gregor kowskica998612009-12-09 23:25:05 +010040enum ieee80211_internal_tkip_state {
41 TKIP_STATE_NOT_INIT,
42 TKIP_STATE_PHASE1_DONE,
43 TKIP_STATE_PHASE1_HW_UPLOADED,
44};
45
Harvey Harrisonb0f76b32008-05-14 16:26:19 -070046struct tkip_ctx {
Johannes Berg523b02e2011-07-07 22:28:01 +020047 u16 p1k[5]; /* p1k cache */
48 u32 p1k_iv32; /* iv32 for which p1k computed */
gregor kowskica998612009-12-09 23:25:05 +010049 enum ieee80211_internal_tkip_state state;
Harvey Harrisonb0f76b32008-05-14 16:26:19 -070050};
51
Eliad Pellerf8079d42016-02-14 13:56:35 +020052struct tkip_ctx_rx {
53 struct tkip_ctx ctx;
54 u32 iv32; /* current iv32 */
55 u16 iv16; /* current iv16 */
56};
57
Jiri Bencf0706e82007-05-05 11:45:53 -070058struct ieee80211_key {
Johannes Berg11a843b2007-08-28 17:01:55 -040059 struct ieee80211_local *local;
60 struct ieee80211_sub_if_data *sdata;
61 struct sta_info *sta;
62
Johannes Berg3b967662008-04-08 17:56:52 +020063 /* for sdata list */
Johannes Berg11a843b2007-08-28 17:01:55 -040064 struct list_head list;
65
Johannes Bergad0e2b52010-06-01 10:19:19 +020066 /* protected by key mutex */
Johannes Berg11a843b2007-08-28 17:01:55 -040067 unsigned int flags;
68
Jiri Bencf0706e82007-05-05 11:45:53 -070069 union {
70 struct {
Johannes Berg523b02e2011-07-07 22:28:01 +020071 /* protects tx context */
72 spinlock_t txlock;
73
Jiri Bencf0706e82007-05-05 11:45:53 -070074 /* last used TSC */
Harvey Harrisonb0f76b32008-05-14 16:26:19 -070075 struct tkip_ctx tx;
Jiri Bencf0706e82007-05-05 11:45:53 -070076
77 /* last received RSC */
Eliad Pellerf8079d42016-02-14 13:56:35 +020078 struct tkip_ctx_rx rx[IEEE80211_NUM_TIDS];
Saravanab98ea052012-12-04 19:47:42 +053079
80 /* number of mic failures */
81 u32 mic_failures;
Jiri Bencf0706e82007-05-05 11:45:53 -070082 } tkip;
83 struct {
Jouni Malinen91902522010-06-11 10:27:33 -070084 /*
85 * Last received packet number. The first
Johannes Berg5a306f52012-11-14 23:22:21 +010086 * IEEE80211_NUM_TIDS counters are used with Data
Jouni Malinen91902522010-06-11 10:27:33 -070087 * frames and the last counter is used with Robust
88 * Management frames.
89 */
Johannes Berg4325f6c2013-05-08 13:09:08 +020090 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
Ard Biesheuvel7ec7c4a2013-10-10 09:55:20 +020091 struct crypto_aead *tfm;
Jiri Bencf0706e82007-05-05 11:45:53 -070092 u32 replays; /* dot11RSNAStatsCCMPReplays */
Jiri Bencf0706e82007-05-05 11:45:53 -070093 } ccmp;
Jouni Malinen765cb462009-01-08 13:32:01 +020094 struct {
Johannes Berg4325f6c2013-05-08 13:09:08 +020095 u8 rx_pn[IEEE80211_CMAC_PN_LEN];
Ard Biesheuvel26717822017-02-06 10:49:28 +000096 struct crypto_shash *tfm;
Jouni Malinen765cb462009-01-08 13:32:01 +020097 u32 replays; /* dot11RSNAStatsCMACReplays */
98 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
Jouni Malinen765cb462009-01-08 13:32:01 +020099 } aes_cmac;
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200100 struct {
Jouni Malinen8ade5382015-01-24 19:52:09 +0200101 u8 rx_pn[IEEE80211_GMAC_PN_LEN];
102 struct crypto_aead *tfm;
103 u32 replays; /* dot11RSNAStatsCMACReplays */
104 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
105 } aes_gmac;
106 struct {
Jouni Malinen00b9cfa2015-01-24 19:52:06 +0200107 /* Last received packet number. The first
108 * IEEE80211_NUM_TIDS counters are used with Data
109 * frames and the last counter is used with Robust
110 * Management frames.
111 */
112 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_GCMP_PN_LEN];
113 struct crypto_aead *tfm;
114 u32 replays; /* dot11RSNAStatsGCMPReplays */
115 } gcmp;
116 struct {
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200117 /* generic cipher scheme */
Johannes Berga31cf1c2015-04-20 18:21:58 +0200118 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_MAX_PN_LEN];
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200119 } gen;
Jiri Bencf0706e82007-05-05 11:45:53 -0700120 } u;
Jiri Bencf0706e82007-05-05 11:45:53 -0700121
Jiri Bence9f207f2007-05-05 11:46:38 -0700122#ifdef CONFIG_MAC80211_DEBUGFS
123 struct {
124 struct dentry *stalink;
125 struct dentry *dir;
Johannes Bergd9c58f32008-04-08 16:46:36 -0400126 int cnt;
Jiri Bence9f207f2007-05-05 11:46:38 -0700127 } debugfs;
128#endif
129
Johannes Berg8f20fc22007-08-28 17:01:54 -0400130 /*
131 * key config, must be last because it contains key
132 * material as variable length member
133 */
134 struct ieee80211_key_conf conf;
Jiri Bencf0706e82007-05-05 11:45:53 -0700135};
136
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200137struct ieee80211_key *
138ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
139 const u8 *key_data,
140 size_t seq_len, const u8 *seq,
141 const struct ieee80211_cipher_scheme *cs);
Johannes Bergdb4d1162008-02-25 16:27:45 +0100142/*
143 * Insert a key into data structures (sdata, sta if necessary)
Johannes Berg79cf2df2013-03-06 22:53:52 +0100144 * to make it used, free old key. On failure, also free the new key.
Johannes Bergdb4d1162008-02-25 16:27:45 +0100145 */
Johannes Berg79cf2df2013-03-06 22:53:52 +0100146int ieee80211_key_link(struct ieee80211_key *key,
147 struct ieee80211_sub_if_data *sdata,
148 struct sta_info *sta);
Johannes Berg3b8d9c22013-03-06 22:58:23 +0100149void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom);
Johannes Berg79cf2df2013-03-06 22:53:52 +0100150void ieee80211_key_free_unused(struct ieee80211_key *key);
Johannes Bergf7e01042010-12-09 19:49:02 +0100151void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
152 bool uni, bool multi);
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200153void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
154 int idx);
Johannes Berg7907c7d2013-12-04 23:47:09 +0100155void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
156 bool force_synchronize);
Johannes Berg6d10e462013-03-06 23:09:11 +0100157void ieee80211_free_sta_keys(struct ieee80211_local *local,
158 struct sta_info *sta);
Johannes Berg11a843b2007-08-28 17:01:55 -0400159void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
Michal Kaziorf9dca802015-05-13 09:16:48 +0000160void ieee80211_reset_crypto_tx_tailroom(struct ieee80211_sub_if_data *sdata);
Johannes Berg11a843b2007-08-28 17:01:55 -0400161
Johannes Berg40b275b2011-05-13 14:15:49 +0200162#define key_mtx_dereference(local, ref) \
163 rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
164
Johannes Berg8d1f7ec2013-02-23 00:59:03 +0100165void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
166
Jiri Bencf0706e82007-05-05 11:45:53 -0700167#endif /* IEEE80211_KEY_H */