1 /*
2  * wpa_supplicant - WPA2/RSN PMKSA cache functions
3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  */
14 
15 #ifndef PMKSA_CACHE_H
16 #define PMKSA_CACHE_H
17 
18 /**
19  * struct rsn_pmksa_cache_entry - PMKSA cache entry
20  */
21 struct rsn_pmksa_cache_entry {
22 	struct rsn_pmksa_cache_entry *next;
23 	u8 pmkid[PMKID_LEN];
24 	u8 pmk[PMK_LEN];
25 	size_t pmk_len;
26 	os_time_t expiration;
27 	int akmp; /* WPA_KEY_MGMT_* */
28 	u8 aa[ETH_ALEN];
29 
30 	os_time_t reauth_time;
31 
32 	/**
33 	 * network_ctx - Network configuration context
34 	 *
35 	 * This field is only used to match PMKSA cache entries to a specific
36 	 * network configuration (e.g., a specific SSID and security policy).
37 	 * This can be a pointer to the configuration entry, but PMKSA caching
38 	 * code does not dereference the value and this could be any kind of
39 	 * identifier.
40 	 */
41 	void *network_ctx;
42 	int opportunistic;
43 };
44 
45 struct rsn_pmksa_cache;
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, int replace),
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 int pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len);
57 struct rsn_pmksa_cache_entry *
58 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
59 		const u8 *aa, const u8 *spa, void *network_ctx, int akmp);
60 void pmksa_cache_notify_reconfig(struct rsn_pmksa_cache *pmksa);
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 
70 #else /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
71 
72 static inline struct rsn_pmksa_cache *
73 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
74 				 void *ctx, int replace),
75 		 void *ctx, struct wpa_sm *sm)
76 {
77 	return (void *) -1;
78 }
79 
80 static inline void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa)
81 {
82 }
83 
84 static inline struct rsn_pmksa_cache_entry *
85 pmksa_cache_get(struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *pmkid)
86 {
87 	return NULL;
88 }
89 
90 static inline struct rsn_pmksa_cache_entry *
91 pmksa_cache_get_current(struct wpa_sm *sm)
92 {
93 	return NULL;
94 }
95 
96 static inline int pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
97 {
98 	return -1;
99 }
100 
101 static inline struct rsn_pmksa_cache_entry *
102 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
103 		const u8 *aa, const u8 *spa, void *network_ctx, int akmp)
104 {
105 	return NULL;
106 }
107 
108 static inline void pmksa_cache_notify_reconfig(struct rsn_pmksa_cache *pmksa)
109 {
110 }
111 
112 static inline void pmksa_cache_clear_current(struct wpa_sm *sm)
113 {
114 }
115 
116 static 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 
124 #endif /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
125 
126 #endif /* PMKSA_CACHE_H */
127