[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 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(enum ieee80211_key_alg alg,
					  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.
 */
void 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
ffd7891d LR	19	#define WEP_IV_LEN 4
	20	#define WEP_ICV_LEN 4
	21	#define ALG_TKIP_KEY_LEN 32
	22	#define ALG_CCMP_KEY_LEN 16
	23	#define CCMP_HDR_LEN 8
	24	#define CCMP_MIC_LEN 8
	25	#define CCMP_TK_LEN 16
	26	#define CCMP_PN_LEN 6
	27	#define TKIP_IV_LEN 8
	28	#define TKIP_ICV_LEN 4
	29
	30	#define NUM_RX_DATA_QUEUES 17
f0706e82	31
11a843b7 JB	32	struct ieee80211_local;
	33	struct ieee80211_sub_if_data;
	34	struct sta_info;
	35
db4d1169 JB	36	/**
	37	* enum ieee80211_internal_key_flags - internal key flags
	38	*
	39	* @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
	40	* in the hardware for TX crypto hardware acceleration.
db4d1169 JB	41	*/
	42	enum ieee80211_internal_key_flags {
	43	KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
db4d1169	44	};
11a843b7	45
ca99861d	46	enum ieee80211_internal_tkip_state {
	47	TKIP_STATE_NOT_INIT,
	48	TKIP_STATE_PHASE1_DONE,
	49	TKIP_STATE_PHASE1_HW_UPLOADED,
	50	};
	51
b0f76b33 HH	52	struct tkip_ctx {
	53	u32 iv32;
	54	u16 iv16;
	55	u16 p1k[5];
ca99861d	56	enum ieee80211_internal_tkip_state state;
b0f76b33 HH	57	};
b0f76b33 HH	58
f0706e82	59	struct ieee80211_key {
11a843b7 JB	60	struct ieee80211_local *local;
	61	struct ieee80211_sub_if_data *sdata;
	62	struct sta_info *sta;
	63
3b96766f	64	/* for sdata list */
11a843b7 JB	65	struct list_head list;
11a843b7 JB	66
ad0e2b5a	67	/* protected by key mutex */
11a843b7 JB	68	unsigned int flags;
11a843b7 JB	69
f0706e82 JB	70	union {
	71	struct {
	72	/* last used TSC */
b0f76b33	73	struct tkip_ctx tx;
f0706e82 JB	74
f0706e82 JB	75	/* last received RSC */
b0f76b33	76	struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
f0706e82 JB	77	} tkip;
	78	struct {
	79	u8 tx_pn[6];
9190252c JM	80	/*
	81	* Last received packet number. The first
	82	* NUM_RX_DATA_QUEUES counters are used with Data
	83	* frames and the last counter is used with Robust
	84	* Management frames.
	85	*/
	86	u8 rx_pn[NUM_RX_DATA_QUEUES + 1][6];
f0706e82 JB	87	struct crypto_cipher *tfm;
	88	u32 replays; /* dot11RSNAStatsCCMPReplays */
	89	/* scratch buffers for virt_to_page() (crypto API) */
	90	#ifndef AES_BLOCK_LEN
	91	#define AES_BLOCK_LEN 16
	92	#endif
	93	u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
	94	u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
	95	} ccmp;
765cb46a JM	96	struct {
	97	u8 tx_pn[6];
	98	u8 rx_pn[6];
	99	struct crypto_cipher *tfm;
	100	u32 replays; /* dot11RSNAStatsCMACReplays */
	101	u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
	102	/* scratch buffers for virt_to_page() (crypto API) */
	103	u8 tx_crypto_buf[2 * AES_BLOCK_LEN];
	104	u8 rx_crypto_buf[2 * AES_BLOCK_LEN];
	105	} aes_cmac;
f0706e82	106	} u;
f0706e82	107
8f20fc24 JB	108	/* number of times this key has been used */
8f20fc24 JB	109	int tx_rx_count;
f0706e82	110
e9f207f0 JB	111	#ifdef CONFIG_MAC80211_DEBUGFS
	112	struct {
	113	struct dentry *stalink;
	114	struct dentry *dir;
d9c58f30	115	int cnt;
e9f207f0 JB	116	} debugfs;
	117	#endif
	118
8f20fc24 JB	119	/*
	120	* key config, must be last because it contains key
	121	* material as variable length member
	122	*/
	123	struct ieee80211_key_conf conf;
f0706e82 JB	124	};
f0706e82 JB	125
db4d1169	126	struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
11a843b7 JB	127	int idx,
11a843b7 JB	128	size_t key_len,
faa8fdc8 JM	129	const u8 *key_data,
faa8fdc8 JM	130	size_t seq_len, const u8 *seq);
db4d1169 JB	131	/*
	132	* Insert a key into data structures (sdata, sta if necessary)
	133	* to make it used, free old key.
	134	*/
	135	void ieee80211_key_link(struct ieee80211_key *key,
	136	struct ieee80211_sub_if_data *sdata,
	137	struct sta_info *sta);
32162a4d JM	138	void ieee80211_key_free(struct ieee80211_local *local,
32162a4d JM	139	struct ieee80211_key *key);
11a843b7	140	void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
3cfcf6ac JM	141	void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
3cfcf6ac JM	142	int idx);
11a843b7 JB	143	void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
	144	void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
	145	void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
	146
f0706e82	147	#endif /* IEEE80211_KEY_H */