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 */
15 struct 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
39 struct rsn_pmksa_cache;
40
41 #if defined(IEEE8021X_EAPOL) && !defined(CONFIG_NO_WPA2)
42
43 struct rsn_pmksa_cache *
44 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
45 void *ctx, int replace),
46 void *ctx, struct wpa_sm *sm);
47 void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa);
48 struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa,
49 const u8 *aa, const u8 *pmkid,
50 const void *network_ctx);
51 int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len);
52 struct rsn_pmksa_cache_entry *
53 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
54 const u8 *aa, const u8 *spa, void *network_ctx, int akmp);
55 struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm);
56 void pmksa_cache_clear_current(struct wpa_sm *sm);
57 int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
58 const u8 *bssid, void *network_ctx,
59 int try_opportunistic);
60 struct rsn_pmksa_cache_entry *
61 pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa,
62 void *network_ctx, const u8 *aa);
63 void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx);
64
65 #else /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
66
67 static inline struct rsn_pmksa_cache *
pmksa_cache_init(void (* free_cb)(struct rsn_pmksa_cache_entry * entry,void * ctx,int replace),void * ctx,struct wpa_sm * sm)68 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
69 void *ctx, int replace),
70 void *ctx, struct wpa_sm *sm)
71 {
72 return (void *) -1;
73 }
74
pmksa_cache_deinit(struct rsn_pmksa_cache * pmksa)75 static inline void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa)
76 {
77 }
78
79 static inline struct rsn_pmksa_cache_entry *
pmksa_cache_get(struct rsn_pmksa_cache * pmksa,const u8 * aa,const u8 * pmkid,const void * network_ctx)80 pmksa_cache_get(struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *pmkid,
81 const void *network_ctx)
82 {
83 return NULL;
84 }
85
86 static inline struct rsn_pmksa_cache_entry *
pmksa_cache_get_current(struct wpa_sm * sm)87 pmksa_cache_get_current(struct wpa_sm *sm)
88 {
89 return NULL;
90 }
91
pmksa_cache_list(struct rsn_pmksa_cache * pmksa,char * buf,size_t len)92 static inline int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf,
93 size_t len)
94 {
95 return -1;
96 }
97
98 static inline struct rsn_pmksa_cache_entry *
pmksa_cache_add(struct rsn_pmksa_cache * pmksa,const u8 * pmk,size_t pmk_len,const u8 * aa,const u8 * spa,void * network_ctx,int akmp)99 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
100 const u8 *aa, const u8 *spa, void *network_ctx, int akmp)
101 {
102 return NULL;
103 }
104
pmksa_cache_clear_current(struct wpa_sm * sm)105 static inline void pmksa_cache_clear_current(struct wpa_sm *sm)
106 {
107 }
108
pmksa_cache_set_current(struct wpa_sm * sm,const u8 * pmkid,const u8 * bssid,void * network_ctx,int try_opportunistic)109 static inline int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
110 const u8 *bssid,
111 void *network_ctx,
112 int try_opportunistic)
113 {
114 return -1;
115 }
116
pmksa_cache_flush(struct rsn_pmksa_cache * pmksa,void * network_ctx)117 static inline void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa,
118 void *network_ctx)
119 {
120 }
121
122 #endif /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
123
124 #endif /* PMKSA_CACHE_H */
125