blob: c33384912782f0c71395bc80fae8664ee67ac7f2 [file] [log] [blame]
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>
14#include <linux/kref.h>
15#include <linux/crypto.h>
16#include <net/mac80211.h>
17
18/* ALG_TKIP
19 * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
20 * Temporal Encryption Key (128 bits)
21 * Temporal Authenticator Tx MIC Key (64 bits)
22 * Temporal Authenticator Rx MIC Key (64 bits)
23 */
24
25#define WEP_IV_LEN 4
26#define WEP_ICV_LEN 4
27
28#define ALG_TKIP_KEY_LEN 32
29/* Starting offsets for each key */
30#define ALG_TKIP_TEMP_ENCR_KEY 0
31#define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
32#define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
33#define TKIP_IV_LEN 8
34#define TKIP_ICV_LEN 4
35
36#define ALG_CCMP_KEY_LEN 16
37#define CCMP_HDR_LEN 8
38#define CCMP_MIC_LEN 8
39#define CCMP_TK_LEN 16
40#define CCMP_PN_LEN 6
41
42#define NUM_RX_DATA_QUEUES 17
43
44struct ieee80211_key {
45 struct kref kref;
46
47 int hw_key_idx; /* filled and used by low-level driver */
48 ieee80211_key_alg alg;
49 union {
50 struct {
51 /* last used TSC */
52 u32 iv32;
53 u16 iv16;
54 u16 p1k[5];
55 int tx_initialized;
56
57 /* last received RSC */
58 u32 iv32_rx[NUM_RX_DATA_QUEUES];
59 u16 iv16_rx[NUM_RX_DATA_QUEUES];
60 u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
61 int rx_initialized[NUM_RX_DATA_QUEUES];
62 } tkip;
63 struct {
64 u8 tx_pn[6];
65 u8 rx_pn[NUM_RX_DATA_QUEUES][6];
66 struct crypto_cipher *tfm;
67 u32 replays; /* dot11RSNAStatsCCMPReplays */
68 /* scratch buffers for virt_to_page() (crypto API) */
69#ifndef AES_BLOCK_LEN
70#define AES_BLOCK_LEN 16
71#endif
72 u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
73 u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
74 } ccmp;
75 } u;
76 int tx_rx_count; /* number of times this key has been used */
77 int keylen;
78
79 /* if the low level driver can provide hardware acceleration it should
80 * clear this flag */
81 unsigned int force_sw_encrypt:1;
82 unsigned int default_tx_key:1; /* This key is the new default TX key
83 * (used only for broadcast keys). */
84 s8 keyidx; /* WEP key index */
85
Jiri Bence9f207f2007-05-05 11:46:38 -070086#ifdef CONFIG_MAC80211_DEBUGFS
87 struct {
88 struct dentry *stalink;
89 struct dentry *dir;
90 struct dentry *keylen;
91 struct dentry *force_sw_encrypt;
92 struct dentry *keyidx;
93 struct dentry *hw_key_idx;
94 struct dentry *tx_rx_count;
95 struct dentry *algorithm;
96 struct dentry *tx_spec;
97 struct dentry *rx_spec;
98 struct dentry *replays;
99 struct dentry *key;
100 } debugfs;
101#endif
102
Jiri Bencf0706e82007-05-05 11:45:53 -0700103 u8 key[0];
104};
105
106#endif /* IEEE80211_KEY_H */