1 /* 2 * wpa_supplicant - WPA2/RSN PMKSA cache functions 3 * Copyright (c) 2003-2009, 2011-2012, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef PMKSA_CACHE_H 10 #define PMKSA_CACHE_H 11 12 /** 13 * struct rsn_pmksa_cache_entry - PMKSA cache entry 14 */ 15 struct rsn_pmksa_cache_entry { 16 struct rsn_pmksa_cache_entry *next; 17 u8 pmkid[PMKID_LEN]; 18 u8 pmk[PMK_LEN_MAX]; 19 size_t pmk_len; 20 os_time_t expiration; 21 int akmp; /* WPA_KEY_MGMT_* */ 22 u8 aa[ETH_ALEN]; 23 24 /* 25 * If FILS Cache Identifier is included (fils_cache_id_set), this PMKSA 26 * cache entry is applicable to all BSSs (any BSSID/aa[]) that 27 * advertise the same FILS Cache Identifier within the same ESS. 28 */ 29 u8 fils_cache_id[2]; 30 unsigned int fils_cache_id_set:1; 31 32 os_time_t reauth_time; 33 34 /** 35 * network_ctx - Network configuration context 36 * 37 * This field is only used to match PMKSA cache entries to a specific 38 * network configuration (e.g., a specific SSID and security policy). 39 * This can be a pointer to the configuration entry, but PMKSA caching 40 * code does not dereference the value and this could be any kind of 41 * identifier. 42 */ 43 void *network_ctx; 44 int opportunistic; 45 }; 46 47 struct rsn_pmksa_cache; 48 49 enum pmksa_free_reason { 50 PMKSA_FREE, 51 PMKSA_REPLACE, 52 PMKSA_EXPIRE, 53 }; 54 55 #if defined(IEEE8021X_EAPOL) && !defined(CONFIG_NO_WPA) 56 57 struct rsn_pmksa_cache * 58 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry, 59 void *ctx, enum pmksa_free_reason reason), 60 void *ctx, struct wpa_sm *sm); 61 void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa); 62 struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa, 63 const u8 *aa, const u8 *pmkid, 64 const void *network_ctx); 65 int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len); 66 struct rsn_pmksa_cache_entry * pmksa_cache_head(struct rsn_pmksa_cache *pmksa); 67 struct rsn_pmksa_cache_entry * 68 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, 69 const u8 *pmkid, const u8 *kck, size_t kck_len, 70 const u8 *aa, const u8 *spa, void *network_ctx, int akmp, 71 const u8 *cache_id); 72 struct rsn_pmksa_cache_entry * 73 pmksa_cache_add_entry(struct rsn_pmksa_cache *pmksa, 74 struct rsn_pmksa_cache_entry *entry); 75 struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm); 76 void pmksa_cache_clear_current(struct wpa_sm *sm); 77 int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid, 78 const u8 *bssid, void *network_ctx, 79 int try_opportunistic, const u8 *fils_cache_id); 80 struct rsn_pmksa_cache_entry * 81 pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa, 82 void *network_ctx, const u8 *aa); 83 void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx, 84 const u8 *pmk, size_t pmk_len); 85 86 #else /* IEEE8021X_EAPOL */ 87 88 static inline struct rsn_pmksa_cache * 89 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry, 90 void *ctx, enum pmksa_free_reason reason), 91 void *ctx, struct wpa_sm *sm) 92 { 93 return (void *) -1; 94 } 95 96 static inline void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa) 97 { 98 } 99 100 static inline struct rsn_pmksa_cache_entry * 101 pmksa_cache_get(struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *pmkid, 102 const void *network_ctx) 103 { 104 return NULL; 105 } 106 107 static inline struct rsn_pmksa_cache_entry * 108 pmksa_cache_get_current(struct wpa_sm *sm) 109 { 110 return NULL; 111 } 112 113 static inline int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, 114 size_t len) 115 { 116 return -1; 117 } 118 119 static inline struct rsn_pmksa_cache_entry * 120 pmksa_cache_head(struct rsn_pmksa_cache *pmksa) 121 { 122 return NULL; 123 } 124 125 static inline struct rsn_pmksa_cache_entry * 126 pmksa_cache_add_entry(struct rsn_pmksa_cache *pmksa, 127 struct rsn_pmksa_cache_entry *entry) 128 { 129 return NULL; 130 } 131 132 static inline struct rsn_pmksa_cache_entry * 133 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, 134 const u8 *pmkid, const u8 *kck, size_t kck_len, 135 const u8 *aa, const u8 *spa, void *network_ctx, int akmp, 136 const u8 *cache_id) 137 { 138 return NULL; 139 } 140 141 static inline void pmksa_cache_clear_current(struct wpa_sm *sm) 142 { 143 } 144 145 static inline int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid, 146 const u8 *bssid, 147 void *network_ctx, 148 int try_opportunistic, 149 const u8 *fils_cache_id) 150 { 151 return -1; 152 } 153 154 static inline void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, 155 void *network_ctx, 156 const u8 *pmk, size_t pmk_len) 157 { 158 } 159 160 #endif /* IEEE8021X_EAPOL */ 161 162 #endif /* PMKSA_CACHE_H */ 163
