[linux-2.6-block.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>

/* ALG_TKIP
 * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
 * Temporal Encryption Key (128 bits)
 * Temporal Authenticator Tx MIC Key (64 bits)
 * Temporal Authenticator Rx MIC Key (64 bits)
 */

#define WEP_IV_LEN 4
#define WEP_ICV_LEN 4

#define ALG_TKIP_KEY_LEN 32
/* Starting offsets for each key */
#define ALG_TKIP_TEMP_ENCR_KEY 0
#define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
#define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
#define TKIP_IV_LEN 8
#define TKIP_ICV_LEN 4

#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 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.
 * @KEY_FLAG_TODO_DELETE: Key is marked for deletion and will, after an
 *	RCU grace period, no longer be reachable other than from the
 *	todo list.
 * @KEY_FLAG_TODO_HWACCEL: Key needs to be added to hardware acceleration.
 * @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated.
 * @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs.
 */
enum ieee80211_internal_key_flags {
	KEY_FLAG_UPLOADED_TO_HARDWARE	= BIT(0),
	KEY_FLAG_TODO_DELETE		= BIT(1),
	KEY_FLAG_TODO_HWACCEL		= BIT(2),
	KEY_FLAG_TODO_DEFKEY		= BIT(3),
	KEY_FLAG_TODO_ADD_DEBUGFS	= BIT(4),
};

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

	/* for sdata list */
	struct list_head list;
	/* for todo list */
	struct list_head todo;

	/* protected by todo lock! */
	unsigned int flags;

	union {
		struct {
			/* last used TSC */
			u32 iv32;
			u16 iv16;
			u16 p1k[5];
			int tx_initialized;

			/* last received RSC */
			u32 iv32_rx[NUM_RX_DATA_QUEUES];
			u16 iv16_rx[NUM_RX_DATA_QUEUES];
			u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
			int rx_initialized[NUM_RX_DATA_QUEUES];
		} tkip;
		struct {
			u8 tx_pn[6];
			u8 rx_pn[NUM_RX_DATA_QUEUES][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;
	} u;

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

#ifdef CONFIG_MAC80211_DEBUGFS
	struct {
		struct dentry *stalink;
		struct dentry *dir;
		struct dentry *keylen;
		struct dentry *flags;
		struct dentry *keyidx;
		struct dentry *hw_key_idx;
		struct dentry *tx_rx_count;
		struct dentry *algorithm;
		struct dentry *tx_spec;
		struct dentry *rx_spec;
		struct dentry *replays;
		struct dentry *key;
		struct dentry *ifindex;
	} 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);
/*
 * 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_key *key);
void ieee80211_set_default_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);

void ieee80211_key_todo(void);

#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>
	18
	19	/* ALG_TKIP
	20	* struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
	21	* Temporal Encryption Key (128 bits)
	22	* Temporal Authenticator Tx MIC Key (64 bits)
	23	* Temporal Authenticator Rx MIC Key (64 bits)
	24	*/
	25
	26	#define WEP_IV_LEN 4
	27	#define WEP_ICV_LEN 4
	28
	29	#define ALG_TKIP_KEY_LEN 32
	30	/* Starting offsets for each key */
	31	#define ALG_TKIP_TEMP_ENCR_KEY 0
	32	#define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
	33	#define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
	34	#define TKIP_IV_LEN 8
	35	#define TKIP_ICV_LEN 4
	36
	37	#define ALG_CCMP_KEY_LEN 16
	38	#define CCMP_HDR_LEN 8
	39	#define CCMP_MIC_LEN 8
	40	#define CCMP_TK_LEN 16
	41	#define CCMP_PN_LEN 6
	42
	43	#define NUM_RX_DATA_QUEUES 17
	44
11a843b7 JB	45	struct ieee80211_local;
	46	struct ieee80211_sub_if_data;
	47	struct sta_info;
	48
db4d1169 JB	49	/**
	50	* enum ieee80211_internal_key_flags - internal key flags
	51	*
	52	* @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
	53	* in the hardware for TX crypto hardware acceleration.
3b96766f JB	54	* @KEY_FLAG_TODO_DELETE: Key is marked for deletion and will, after an
	55	* RCU grace period, no longer be reachable other than from the
	56	* todo list.
	57	* @KEY_FLAG_TODO_HWACCEL: Key needs to be added to hardware acceleration.
	58	* @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated.
	59	* @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs.
db4d1169 JB	60	*/
	61	enum ieee80211_internal_key_flags {
	62	KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
3b96766f JB	63	KEY_FLAG_TODO_DELETE = BIT(1),
	64	KEY_FLAG_TODO_HWACCEL = BIT(2),
	65	KEY_FLAG_TODO_DEFKEY = BIT(3),
	66	KEY_FLAG_TODO_ADD_DEBUGFS = BIT(4),
db4d1169	67	};
11a843b7	68
f0706e82	69	struct ieee80211_key {
11a843b7 JB	70	struct ieee80211_local *local;
	71	struct ieee80211_sub_if_data *sdata;
	72	struct sta_info *sta;
	73
3b96766f	74	/* for sdata list */
11a843b7	75	struct list_head list;
3b96766f JB	76	/* for todo list */
3b96766f JB	77	struct list_head todo;
11a843b7	78
3b96766f	79	/* protected by todo lock! */
11a843b7 JB	80	unsigned int flags;
11a843b7 JB	81
f0706e82 JB	82	union {
	83	struct {
	84	/* last used TSC */
	85	u32 iv32;
	86	u16 iv16;
	87	u16 p1k[5];
	88	int tx_initialized;
	89
	90	/* last received RSC */
	91	u32 iv32_rx[NUM_RX_DATA_QUEUES];
	92	u16 iv16_rx[NUM_RX_DATA_QUEUES];
	93	u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
	94	int rx_initialized[NUM_RX_DATA_QUEUES];
	95	} tkip;
	96	struct {
	97	u8 tx_pn[6];
	98	u8 rx_pn[NUM_RX_DATA_QUEUES][6];
	99	struct crypto_cipher *tfm;
	100	u32 replays; /* dot11RSNAStatsCCMPReplays */
	101	/* scratch buffers for virt_to_page() (crypto API) */
	102	#ifndef AES_BLOCK_LEN
	103	#define AES_BLOCK_LEN 16
	104	#endif
	105	u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
	106	u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
	107	} ccmp;
	108	} u;
f0706e82	109
8f20fc24 JB	110	/* number of times this key has been used */
8f20fc24 JB	111	int tx_rx_count;
f0706e82	112
e9f207f0 JB	113	#ifdef CONFIG_MAC80211_DEBUGFS
	114	struct {
	115	struct dentry *stalink;
	116	struct dentry *dir;
	117	struct dentry *keylen;
8f20fc24	118	struct dentry *flags;
e9f207f0 JB	119	struct dentry *keyidx;
	120	struct dentry *hw_key_idx;
	121	struct dentry *tx_rx_count;
	122	struct dentry *algorithm;
	123	struct dentry *tx_spec;
	124	struct dentry *rx_spec;
	125	struct dentry *replays;
	126	struct dentry *key;
e7a64f12	127	struct dentry *ifindex;
e9f207f0 JB	128	} debugfs;
	129	#endif
	130
8f20fc24 JB	131	/*
	132	* key config, must be last because it contains key
	133	* material as variable length member
	134	*/
	135	struct ieee80211_key_conf conf;
f0706e82 JB	136	};
f0706e82 JB	137
db4d1169	138	struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
11a843b7 JB	139	int idx,
	140	size_t key_len,
	141	const u8 *key_data);
db4d1169 JB	142	/*
	143	* Insert a key into data structures (sdata, sta if necessary)
	144	* to make it used, free old key.
	145	*/
	146	void ieee80211_key_link(struct ieee80211_key *key,
	147	struct ieee80211_sub_if_data *sdata,
	148	struct sta_info *sta);
11a843b7 JB	149	void ieee80211_key_free(struct ieee80211_key *key);
	150	void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
	151	void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
	152	void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
	153	void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
	154
3b96766f JB	155	void ieee80211_key_todo(void);
3b96766f JB	156
f0706e82	157	#endif /* IEEE80211_KEY_H */