| /* |
| * 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 MAX_PN_LEN 16 |
| |
| 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_TAINTED: Key is tainted and packets should be dropped. |
| */ |
| enum ieee80211_internal_key_flags { |
| KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), |
| KEY_FLAG_TAINTED = BIT(1), |
| }; |
| |
| enum ieee80211_internal_tkip_state { |
| TKIP_STATE_NOT_INIT, |
| TKIP_STATE_PHASE1_DONE, |
| TKIP_STATE_PHASE1_HW_UPLOADED, |
| }; |
| |
| struct tkip_ctx { |
| u32 iv32; /* current iv32 */ |
| u16 iv16; /* current iv16 */ |
| u16 p1k[5]; /* p1k cache */ |
| u32 p1k_iv32; /* iv32 for which p1k computed */ |
| 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 { |
| /* protects tx context */ |
| spinlock_t txlock; |
| |
| /* last used TSC */ |
| struct tkip_ctx tx; |
| |
| /* last received RSC */ |
| struct tkip_ctx rx[IEEE80211_NUM_TIDS]; |
| |
| /* number of mic failures */ |
| u32 mic_failures; |
| } tkip; |
| struct { |
| atomic64_t tx_pn; |
| /* |
| * Last received packet number. The first |
| * IEEE80211_NUM_TIDS counters are used with Data |
| * frames and the last counter is used with Robust |
| * Management frames. |
| */ |
| u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN]; |
| struct crypto_aead *tfm; |
| u32 replays; /* dot11RSNAStatsCCMPReplays */ |
| } ccmp; |
| struct { |
| atomic64_t tx_pn; |
| u8 rx_pn[IEEE80211_CMAC_PN_LEN]; |
| struct crypto_cipher *tfm; |
| u32 replays; /* dot11RSNAStatsCMACReplays */ |
| u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ |
| } aes_cmac; |
| struct { |
| /* generic cipher scheme */ |
| u8 rx_pn[IEEE80211_NUM_TIDS + 1][MAX_PN_LEN]; |
| } gen; |
| } 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, |
| const struct ieee80211_cipher_scheme *cs); |
| /* |
| * Insert a key into data structures (sdata, sta if necessary) |
| * to make it used, free old key. On failure, also free the new key. |
| */ |
| int 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, bool delay_tailroom); |
| void ieee80211_key_free_unused(struct ieee80211_key *key); |
| void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
| bool uni, bool multi); |
| 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_free_sta_keys(struct ieee80211_local *local, |
| struct sta_info *sta); |
| void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); |
| |
| #define key_mtx_dereference(local, ref) \ |
| rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx))) |
| |
| void ieee80211_delayed_tailroom_dec(struct work_struct *wk); |
| |
| #endif /* IEEE80211_KEY_H */ |