[net-next-2.6.git] / net / mac80211 / key.h

/*
 * Copyright 2002-2004, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef IEEE80211_KEY_H
#define IEEE80211_KEY_H

#include <linux/types.h>
#include <linux/list.h>
#include <linux/crypto.h>
#include <linux/rcupdate.h>
#include <net/mac80211.h>

#define NUM_DEFAULT_KEYS 4
#define NUM_DEFAULT_MGMT_KEYS 2

#define WEP_IV_LEN		4
#define WEP_ICV_LEN		4
#define ALG_TKIP_KEY_LEN	32
#define ALG_CCMP_KEY_LEN	16
#define CCMP_HDR_LEN		8
#define CCMP_MIC_LEN		8
#define CCMP_TK_LEN		16
#define CCMP_PN_LEN		6
#define TKIP_IV_LEN		8
#define TKIP_ICV_LEN		4

#define NUM_RX_DATA_QUEUES	17

struct ieee80211_local;
struct ieee80211_sub_if_data;
struct sta_info;

/**
 * enum ieee80211_internal_key_flags - internal key flags
 *
 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
 *	in the hardware for TX crypto hardware acceleration.
 */
enum ieee80211_internal_key_flags {
	KEY_FLAG_UPLOADED_TO_HARDWARE	= BIT(0),
};

enum ieee80211_internal_tkip_state {
	TKIP_STATE_NOT_INIT,
	TKIP_STATE_PHASE1_DONE,
	TKIP_STATE_PHASE1_HW_UPLOADED,
};

struct tkip_ctx {
	u32 iv32;
	u16 iv16;
	u16 p1k[5];
	enum ieee80211_internal_tkip_state state;
};

struct ieee80211_key {
	struct ieee80211_local *local;
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;

	/* for sdata list */
	struct list_head list;

	/* protected by key mutex */
	unsigned int flags;

	union {
		struct {
			/* last used TSC */
			struct tkip_ctx tx;

			/* last received RSC */
			struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
		} tkip;
		struct {
			u8 tx_pn[6];
			/*
			 * Last received packet number. The first
			 * NUM_RX_DATA_QUEUES counters are used with Data
			 * frames and the last counter is used with Robust
			 * Management frames.
			 */
			u8 rx_pn[NUM_RX_DATA_QUEUES + 1][6];
			struct crypto_cipher *tfm;
			u32 replays; /* dot11RSNAStatsCCMPReplays */
			/* scratch buffers for virt_to_page() (crypto API) */
#ifndef AES_BLOCK_LEN
#define AES_BLOCK_LEN 16
#endif
			u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
			u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
		} ccmp;
		struct {
			u8 tx_pn[6];
			u8 rx_pn[6];
			struct crypto_cipher *tfm;
			u32 replays; /* dot11RSNAStatsCMACReplays */
			u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
			/* scratch buffers for virt_to_page() (crypto API) */
			u8 tx_crypto_buf[2 * AES_BLOCK_LEN];
			u8 rx_crypto_buf[2 * AES_BLOCK_LEN];
		} aes_cmac;
	} u;

	/* number of times this key has been used */
	int tx_rx_count;

#ifdef CONFIG_MAC80211_DEBUGFS
	struct {
		struct dentry *stalink;
		struct dentry *dir;
		int cnt;
	} debugfs;
#endif

	/*
	 * key config, must be last because it contains key
	 * material as variable length member
	 */
	struct ieee80211_key_conf conf;
};

struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
					  const u8 *key_data,
					  size_t seq_len, const u8 *seq);
/*
 * Insert a key into data structures (sdata, sta if necessary)
 * to make it used, free old key.
 */
int __must_check ieee80211_key_link(struct ieee80211_key *key,
				    struct ieee80211_sub_if_data *sdata,
				    struct sta_info *sta);
void ieee80211_key_free(struct ieee80211_local *local,
			struct ieee80211_key *key);
void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
				    int idx);
void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);

#endif /* IEEE80211_KEY_H */
Commit	Line	Data
f0706e82 JB	1	/*
	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>
8f37171a	14	#include <linux/list.h>
f0706e82	15	#include <linux/crypto.h>
db4d1169	16	#include <linux/rcupdate.h>
f0706e82 JB	17	#include <net/mac80211.h>
f0706e82 JB	18
e31b8213 JB	19	#define NUM_DEFAULT_KEYS 4
	20	#define NUM_DEFAULT_MGMT_KEYS 2
	21
ffd7891d LR	22	#define WEP_IV_LEN 4
	23	#define WEP_ICV_LEN 4
	24	#define ALG_TKIP_KEY_LEN 32
	25	#define ALG_CCMP_KEY_LEN 16
	26	#define CCMP_HDR_LEN 8
	27	#define CCMP_MIC_LEN 8
	28	#define CCMP_TK_LEN 16
	29	#define CCMP_PN_LEN 6
	30	#define TKIP_IV_LEN 8
	31	#define TKIP_ICV_LEN 4
	32
	33	#define NUM_RX_DATA_QUEUES 17
f0706e82	34
11a843b7 JB	35	struct ieee80211_local;
	36	struct ieee80211_sub_if_data;
	37	struct sta_info;
	38
db4d1169 JB	39	/**
	40	* enum ieee80211_internal_key_flags - internal key flags
	41	*
	42	* @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
	43	* in the hardware for TX crypto hardware acceleration.
db4d1169 JB	44	*/
	45	enum ieee80211_internal_key_flags {
	46	KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
db4d1169	47	};
11a843b7	48
ca99861d	49	enum ieee80211_internal_tkip_state {
	50	TKIP_STATE_NOT_INIT,
	51	TKIP_STATE_PHASE1_DONE,
	52	TKIP_STATE_PHASE1_HW_UPLOADED,
	53	};
	54
b0f76b33 HH	55	struct tkip_ctx {
	56	u32 iv32;
	57	u16 iv16;
	58	u16 p1k[5];
ca99861d	59	enum ieee80211_internal_tkip_state state;
b0f76b33 HH	60	};
b0f76b33 HH	61
f0706e82	62	struct ieee80211_key {
11a843b7 JB	63	struct ieee80211_local *local;
	64	struct ieee80211_sub_if_data *sdata;
	65	struct sta_info *sta;
	66
3b96766f	67	/* for sdata list */
11a843b7 JB	68	struct list_head list;
11a843b7 JB	69
ad0e2b5a	70	/* protected by key mutex */
11a843b7 JB	71	unsigned int flags;
11a843b7 JB	72
f0706e82 JB	73	union {
	74	struct {
	75	/* last used TSC */
b0f76b33	76	struct tkip_ctx tx;
f0706e82 JB	77
f0706e82 JB	78	/* last received RSC */
b0f76b33	79	struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
f0706e82 JB	80	} tkip;
	81	struct {
	82	u8 tx_pn[6];
9190252c JM	83	/*
	84	* Last received packet number. The first
	85	* NUM_RX_DATA_QUEUES counters are used with Data
	86	* frames and the last counter is used with Robust
	87	* Management frames.
	88	*/
	89	u8 rx_pn[NUM_RX_DATA_QUEUES + 1][6];
f0706e82 JB	90	struct crypto_cipher *tfm;
	91	u32 replays; /* dot11RSNAStatsCCMPReplays */
	92	/* scratch buffers for virt_to_page() (crypto API) */
	93	#ifndef AES_BLOCK_LEN
	94	#define AES_BLOCK_LEN 16
	95	#endif
	96	u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
	97	u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
	98	} ccmp;
765cb46a JM	99	struct {
	100	u8 tx_pn[6];
	101	u8 rx_pn[6];
	102	struct crypto_cipher *tfm;
	103	u32 replays; /* dot11RSNAStatsCMACReplays */
	104	u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
	105	/* scratch buffers for virt_to_page() (crypto API) */
	106	u8 tx_crypto_buf[2 * AES_BLOCK_LEN];
	107	u8 rx_crypto_buf[2 * AES_BLOCK_LEN];
	108	} aes_cmac;
f0706e82	109	} u;
f0706e82	110
8f20fc24 JB	111	/* number of times this key has been used */
8f20fc24 JB	112	int tx_rx_count;
f0706e82	113
e9f207f0 JB	114	#ifdef CONFIG_MAC80211_DEBUGFS
	115	struct {
	116	struct dentry *stalink;
	117	struct dentry *dir;
d9c58f30	118	int cnt;
e9f207f0 JB	119	} debugfs;
	120	#endif
	121
8f20fc24 JB	122	/*
	123	* key config, must be last because it contains key
	124	* material as variable length member
	125	*/
	126	struct ieee80211_key_conf conf;
f0706e82 JB	127	};
f0706e82 JB	128
97359d12	129	struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
faa8fdc8 JM	130	const u8 *key_data,
faa8fdc8 JM	131	size_t seq_len, const u8 *seq);
db4d1169 JB	132	/*
	133	* Insert a key into data structures (sdata, sta if necessary)
	134	* to make it used, free old key.
	135	*/
3ffc2a90 JB	136	int __must_check ieee80211_key_link(struct ieee80211_key *key,
	137	struct ieee80211_sub_if_data *sdata,
	138	struct sta_info *sta);
32162a4d JM	139	void ieee80211_key_free(struct ieee80211_local *local,
32162a4d JM	140	struct ieee80211_key *key);
11a843b7	141	void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
3cfcf6ac JM	142	void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
3cfcf6ac JM	143	int idx);
11a843b7 JB	144	void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
	145	void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
	146	void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
	147
f0706e82	148	#endif /* IEEE80211_KEY_H */