1/* 2 * wpa_supplicant - WPA2/RSN PMKSA cache functions 3 * Copyright (c) 2003-2009, 2011-2012, Jouni Malinen <j@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 */ 15struct rsn_pmksa_cache_entry { 16 struct rsn_pmksa_cache_entry *next; 17 u8 pmkid[PMKID_LEN]; 18 u8 pmk[PMK_LEN]; 19 size_t pmk_len; 20 os_time_t expiration; 21 int akmp; /* WPA_KEY_MGMT_* */ 22 u8 aa[ETH_ALEN]; 23 24 os_time_t reauth_time; 25 26 /** 27 * network_ctx - Network configuration context 28 * 29 * This field is only used to match PMKSA cache entries to a specific 30 * network configuration (e.g., a specific SSID and security policy). 31 * This can be a pointer to the configuration entry, but PMKSA caching 32 * code does not dereference the value and this could be any kind of 33 * identifier. 34 */ 35 void *network_ctx; 36 int opportunistic; 37}; 38 39struct rsn_pmksa_cache; 40 41enum pmksa_free_reason { 42 PMKSA_FREE, 43 PMKSA_REPLACE, 44 PMKSA_EXPIRE, 45}; 46 47#ifdef IEEE8021X_EAPOL 48 49struct rsn_pmksa_cache * 50pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry, 51 void *ctx, enum pmksa_free_reason reason), 52 void *ctx, struct wpa_sm *sm); 53void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa); 54struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa, 55 const u8 *aa, const u8 *pmkid, 56 const void *network_ctx); 57int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len); 58struct rsn_pmksa_cache_entry * 59pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, 60 const u8 *aa, const u8 *spa, void *network_ctx, int akmp); 61struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm); 62void pmksa_cache_clear_current(struct wpa_sm *sm); 63int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid, 64 const u8 *bssid, void *network_ctx, 65 int try_opportunistic); 66struct rsn_pmksa_cache_entry * 67pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa, 68 void *network_ctx, const u8 *aa); 69void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx, 70 const u8 *pmk, size_t pmk_len); 71 72#else /* IEEE8021X_EAPOL */ 73 74static inline struct rsn_pmksa_cache * 75pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry, 76 void *ctx, enum pmksa_free_reason reason), 77 void *ctx, struct wpa_sm *sm) 78{ 79 return (void *) -1; 80} 81 82static inline void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa) 83{ 84} 85 86static inline struct rsn_pmksa_cache_entry * 87pmksa_cache_get(struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *pmkid, 88 const void *network_ctx) 89{ 90 return NULL; 91} 92 93static inline struct rsn_pmksa_cache_entry * 94pmksa_cache_get_current(struct wpa_sm *sm) 95{ 96 return NULL; 97} 98 99static inline int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, 100 size_t len) 101{ 102 return -1; 103} 104 105static inline struct rsn_pmksa_cache_entry * 106pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, 107 const u8 *aa, const u8 *spa, void *network_ctx, int akmp) 108{ 109 return NULL; 110} 111 112static inline void pmksa_cache_clear_current(struct wpa_sm *sm) 113{ 114} 115 116static inline int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid, 117 const u8 *bssid, 118 void *network_ctx, 119 int try_opportunistic) 120{ 121 return -1; 122} 123 124static inline void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, 125 void *network_ctx, 126 const u8 *pmk, size_t pmk_len) 127{ 128} 129 130#endif /* IEEE8021X_EAPOL */ 131 132#endif /* PMKSA_CACHE_H */ 133