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 enum pmksa_free_reason {
42 PMKSA_FREE,
43 PMKSA_REPLACE,
44 PMKSA_EXPIRE,
45 };
46
47 #if defined(IEEE8021X_EAPOL) && !defined(CONFIG_NO_WPA2)
48
49 struct rsn_pmksa_cache *
50 pmksa_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);
53 void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa);
54 struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa,
55 const u8 *aa, const u8 *pmkid,
56 const void *network_ctx);
57 int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len);
58 struct rsn_pmksa_cache_entry *
59 pmksa_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);
61 struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm);
62 void pmksa_cache_clear_current(struct wpa_sm *sm);
63 int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
64 const u8 *bssid, void *network_ctx,
65 int try_opportunistic);
66 struct rsn_pmksa_cache_entry *
67 pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa,
68 void *network_ctx, const u8 *aa);
69 void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx);
70
71 #else /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
72
73 static inline struct rsn_pmksa_cache *
pmksa_cache_init(void (* free_cb)(struct rsn_pmksa_cache_entry * entry,void * ctx,enum pmksa_free_reason reason),void * ctx,struct wpa_sm * sm)74 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
75 void *ctx, enum pmksa_free_reason reason),
76 void *ctx, struct wpa_sm *sm)
77 {
78 return (void *) -1;
79 }
80
pmksa_cache_deinit(struct rsn_pmksa_cache * pmksa)81 static inline void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa)
82 {
83 }
84
85 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)86 pmksa_cache_get(struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *pmkid,
87 const void *network_ctx)
88 {
89 return NULL;
90 }
91
92 static inline struct rsn_pmksa_cache_entry *
pmksa_cache_get_current(struct wpa_sm * sm)93 pmksa_cache_get_current(struct wpa_sm *sm)
94 {
95 return NULL;
96 }
97
pmksa_cache_list(struct rsn_pmksa_cache * pmksa,char * buf,size_t len)98 static inline int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf,
99 size_t len)
100 {
101 return -1;
102 }
103
104 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)105 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
106 const u8 *aa, const u8 *spa, void *network_ctx, int akmp)
107 {
108 return NULL;
109 }
110
pmksa_cache_clear_current(struct wpa_sm * sm)111 static inline void pmksa_cache_clear_current(struct wpa_sm *sm)
112 {
113 }
114
pmksa_cache_set_current(struct wpa_sm * sm,const u8 * pmkid,const u8 * bssid,void * network_ctx,int try_opportunistic)115 static inline int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
116 const u8 *bssid,
117 void *network_ctx,
118 int try_opportunistic)
119 {
120 return -1;
121 }
122
pmksa_cache_flush(struct rsn_pmksa_cache * pmksa,void * network_ctx)123 static inline void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa,
124 void *network_ctx)
125 {
126 }
127
128 #endif /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
129
130 #endif /* PMKSA_CACHE_H */
131