1 /*
2 * hostapd - PMKSA cache for IEEE 802.11i RSN
3 * Copyright (c) 2004-2008, 2012-2015, 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 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "eapol_auth/eapol_auth_sm.h"
14 #include "eapol_auth/eapol_auth_sm_i.h"
15 #include "radius/radius_das.h"
16 #include "sta_info.h"
17 #include "ap_config.h"
18 #include "pmksa_cache_auth.h"
19
20
21 static const int pmksa_cache_max_entries = 1024;
22 static const int dot11RSNAConfigPMKLifetime = 43200;
23
24 struct rsn_pmksa_cache {
25 #define PMKID_HASH_SIZE 128
26 #define PMKID_HASH(pmkid) (unsigned int) ((pmkid)[0] & 0x7f)
27 struct rsn_pmksa_cache_entry *pmkid[PMKID_HASH_SIZE];
28 struct rsn_pmksa_cache_entry *pmksa;
29 int pmksa_count;
30
31 void (*free_cb)(struct rsn_pmksa_cache_entry *entry, void *ctx);
32 void *ctx;
33 };
34
35
36 static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa);
37
38
_pmksa_cache_free_entry(struct rsn_pmksa_cache_entry * entry)39 static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry)
40 {
41 os_free(entry->vlan_desc);
42 os_free(entry->identity);
43 wpabuf_free(entry->cui);
44 #ifndef CONFIG_NO_RADIUS
45 radius_free_class(&entry->radius_class);
46 #endif /* CONFIG_NO_RADIUS */
47 bin_clear_free(entry, sizeof(*entry));
48 }
49
50
pmksa_cache_free_entry(struct rsn_pmksa_cache * pmksa,struct rsn_pmksa_cache_entry * entry)51 void pmksa_cache_free_entry(struct rsn_pmksa_cache *pmksa,
52 struct rsn_pmksa_cache_entry *entry)
53 {
54 struct rsn_pmksa_cache_entry *pos, *prev;
55 unsigned int hash;
56
57 pmksa->pmksa_count--;
58 pmksa->free_cb(entry, pmksa->ctx);
59
60 /* unlink from hash list */
61 hash = PMKID_HASH(entry->pmkid);
62 pos = pmksa->pmkid[hash];
63 prev = NULL;
64 while (pos) {
65 if (pos == entry) {
66 if (prev != NULL)
67 prev->hnext = entry->hnext;
68 else
69 pmksa->pmkid[hash] = entry->hnext;
70 break;
71 }
72 prev = pos;
73 pos = pos->hnext;
74 }
75
76 /* unlink from entry list */
77 pos = pmksa->pmksa;
78 prev = NULL;
79 while (pos) {
80 if (pos == entry) {
81 if (prev != NULL)
82 prev->next = entry->next;
83 else
84 pmksa->pmksa = entry->next;
85 break;
86 }
87 prev = pos;
88 pos = pos->next;
89 }
90
91 _pmksa_cache_free_entry(entry);
92 }
93
94
95 /**
96 * pmksa_cache_auth_flush - Flush all PMKSA cache entries
97 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
98 */
pmksa_cache_auth_flush(struct rsn_pmksa_cache * pmksa)99 void pmksa_cache_auth_flush(struct rsn_pmksa_cache *pmksa)
100 {
101 while (pmksa->pmksa) {
102 wpa_printf(MSG_DEBUG, "RSN: Flush PMKSA cache entry for "
103 MACSTR, MAC2STR(pmksa->pmksa->spa));
104 pmksa_cache_free_entry(pmksa, pmksa->pmksa);
105 }
106 }
107
108
pmksa_cache_expire(void * eloop_ctx,void * timeout_ctx)109 static void pmksa_cache_expire(void *eloop_ctx, void *timeout_ctx)
110 {
111 struct rsn_pmksa_cache *pmksa = eloop_ctx;
112 struct os_reltime now;
113
114 os_get_reltime(&now);
115 while (pmksa->pmksa && pmksa->pmksa->expiration <= now.sec) {
116 wpa_printf(MSG_DEBUG, "RSN: expired PMKSA cache entry for "
117 MACSTR, MAC2STR(pmksa->pmksa->spa));
118 pmksa_cache_free_entry(pmksa, pmksa->pmksa);
119 }
120
121 pmksa_cache_set_expiration(pmksa);
122 }
123
124
pmksa_cache_set_expiration(struct rsn_pmksa_cache * pmksa)125 static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa)
126 {
127 int sec;
128 struct os_reltime now;
129
130 eloop_cancel_timeout(pmksa_cache_expire, pmksa, NULL);
131 if (pmksa->pmksa == NULL)
132 return;
133 os_get_reltime(&now);
134 sec = pmksa->pmksa->expiration - now.sec;
135 if (sec < 0)
136 sec = 0;
137 eloop_register_timeout(sec + 1, 0, pmksa_cache_expire, pmksa, NULL);
138 }
139
140
pmksa_cache_from_eapol_data(struct rsn_pmksa_cache_entry * entry,struct eapol_state_machine * eapol)141 static void pmksa_cache_from_eapol_data(struct rsn_pmksa_cache_entry *entry,
142 struct eapol_state_machine *eapol)
143 {
144 struct vlan_description *vlan_desc;
145
146 if (eapol == NULL)
147 return;
148
149 if (eapol->identity) {
150 entry->identity = os_malloc(eapol->identity_len);
151 if (entry->identity) {
152 entry->identity_len = eapol->identity_len;
153 os_memcpy(entry->identity, eapol->identity,
154 eapol->identity_len);
155 }
156 }
157
158 if (eapol->radius_cui)
159 entry->cui = wpabuf_dup(eapol->radius_cui);
160
161 #ifndef CONFIG_NO_RADIUS
162 radius_copy_class(&entry->radius_class, &eapol->radius_class);
163 #endif /* CONFIG_NO_RADIUS */
164
165 entry->eap_type_authsrv = eapol->eap_type_authsrv;
166
167 vlan_desc = ((struct sta_info *) eapol->sta)->vlan_desc;
168 if (vlan_desc && vlan_desc->notempty) {
169 entry->vlan_desc = os_zalloc(sizeof(struct vlan_description));
170 if (entry->vlan_desc)
171 *entry->vlan_desc = *vlan_desc;
172 } else {
173 entry->vlan_desc = NULL;
174 }
175
176 entry->acct_multi_session_id = eapol->acct_multi_session_id;
177 }
178
179
pmksa_cache_to_eapol_data(struct hostapd_data * hapd,struct rsn_pmksa_cache_entry * entry,struct eapol_state_machine * eapol)180 void pmksa_cache_to_eapol_data(struct hostapd_data *hapd,
181 struct rsn_pmksa_cache_entry *entry,
182 struct eapol_state_machine *eapol)
183 {
184 if (entry == NULL || eapol == NULL)
185 return;
186
187 if (entry->identity) {
188 os_free(eapol->identity);
189 eapol->identity = os_malloc(entry->identity_len);
190 if (eapol->identity) {
191 eapol->identity_len = entry->identity_len;
192 os_memcpy(eapol->identity, entry->identity,
193 entry->identity_len);
194 }
195 wpa_hexdump_ascii(MSG_DEBUG, "STA identity from PMKSA",
196 eapol->identity, eapol->identity_len);
197 }
198
199 if (entry->cui) {
200 wpabuf_free(eapol->radius_cui);
201 eapol->radius_cui = wpabuf_dup(entry->cui);
202 }
203
204 #ifndef CONFIG_NO_RADIUS
205 radius_free_class(&eapol->radius_class);
206 radius_copy_class(&eapol->radius_class, &entry->radius_class);
207 #endif /* CONFIG_NO_RADIUS */
208 if (eapol->radius_class.attr) {
209 wpa_printf(MSG_DEBUG, "Copied %lu Class attribute(s) from "
210 "PMKSA", (unsigned long) eapol->radius_class.count);
211 }
212
213 eapol->eap_type_authsrv = entry->eap_type_authsrv;
214 #ifndef CONFIG_NO_VLAN
215 ap_sta_set_vlan(hapd, eapol->sta, entry->vlan_desc);
216 #endif /* CONFIG_NO_VLAN */
217
218 eapol->acct_multi_session_id = entry->acct_multi_session_id;
219 }
220
221
pmksa_cache_link_entry(struct rsn_pmksa_cache * pmksa,struct rsn_pmksa_cache_entry * entry)222 static void pmksa_cache_link_entry(struct rsn_pmksa_cache *pmksa,
223 struct rsn_pmksa_cache_entry *entry)
224 {
225 struct rsn_pmksa_cache_entry *pos, *prev;
226 int hash;
227
228 /* Add the new entry; order by expiration time */
229 pos = pmksa->pmksa;
230 prev = NULL;
231 while (pos) {
232 if (pos->expiration > entry->expiration)
233 break;
234 prev = pos;
235 pos = pos->next;
236 }
237 if (prev == NULL) {
238 entry->next = pmksa->pmksa;
239 pmksa->pmksa = entry;
240 } else {
241 entry->next = prev->next;
242 prev->next = entry;
243 }
244
245 hash = PMKID_HASH(entry->pmkid);
246 entry->hnext = pmksa->pmkid[hash];
247 pmksa->pmkid[hash] = entry;
248
249 pmksa->pmksa_count++;
250 if (prev == NULL)
251 pmksa_cache_set_expiration(pmksa);
252 wpa_printf(MSG_DEBUG, "RSN: added PMKSA cache entry for " MACSTR,
253 MAC2STR(entry->spa));
254 wpa_hexdump(MSG_DEBUG, "RSN: added PMKID", entry->pmkid, PMKID_LEN);
255 }
256
257
258 /**
259 * pmksa_cache_auth_add - Add a PMKSA cache entry
260 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
261 * @pmk: The new pairwise master key
262 * @pmk_len: PMK length in bytes, usually PMK_LEN (32)
263 * @pmkid: Calculated PMKID
264 * @kck: Key confirmation key or %NULL if not yet derived
265 * @kck_len: KCK length in bytes
266 * @aa: Authenticator address
267 * @spa: Supplicant address
268 * @session_timeout: Session timeout
269 * @eapol: Pointer to EAPOL state machine data
270 * @akmp: WPA_KEY_MGMT_* used in key derivation
271 * Returns: Pointer to the added PMKSA cache entry or %NULL on error
272 *
273 * This function create a PMKSA entry for a new PMK and adds it to the PMKSA
274 * cache. If an old entry is already in the cache for the same Supplicant,
275 * this entry will be replaced with the new entry. PMKID will be calculated
276 * based on the PMK.
277 */
278 struct rsn_pmksa_cache_entry *
pmksa_cache_auth_add(struct rsn_pmksa_cache * pmksa,const u8 * pmk,size_t pmk_len,const u8 * pmkid,const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,int session_timeout,struct eapol_state_machine * eapol,int akmp)279 pmksa_cache_auth_add(struct rsn_pmksa_cache *pmksa,
280 const u8 *pmk, size_t pmk_len, const u8 *pmkid,
281 const u8 *kck, size_t kck_len,
282 const u8 *aa, const u8 *spa, int session_timeout,
283 struct eapol_state_machine *eapol, int akmp)
284 {
285 struct rsn_pmksa_cache_entry *entry;
286
287 entry = pmksa_cache_auth_create_entry(pmk, pmk_len, pmkid, kck, kck_len,
288 aa, spa, session_timeout, eapol,
289 akmp);
290
291 if (pmksa_cache_auth_add_entry(pmksa, entry) < 0)
292 return NULL;
293
294 return entry;
295 }
296
297
298 /**
299 * pmksa_cache_auth_create_entry - Create a PMKSA cache entry
300 * @pmk: The new pairwise master key
301 * @pmk_len: PMK length in bytes, usually PMK_LEN (32)
302 * @pmkid: Calculated PMKID
303 * @kck: Key confirmation key or %NULL if not yet derived
304 * @kck_len: KCK length in bytes
305 * @aa: Authenticator address
306 * @spa: Supplicant address
307 * @session_timeout: Session timeout
308 * @eapol: Pointer to EAPOL state machine data
309 * @akmp: WPA_KEY_MGMT_* used in key derivation
310 * Returns: Pointer to the added PMKSA cache entry or %NULL on error
311 *
312 * This function creates a PMKSA entry.
313 */
314 struct rsn_pmksa_cache_entry *
pmksa_cache_auth_create_entry(const u8 * pmk,size_t pmk_len,const u8 * pmkid,const u8 * kck,size_t kck_len,const u8 * aa,const u8 * spa,int session_timeout,struct eapol_state_machine * eapol,int akmp)315 pmksa_cache_auth_create_entry(const u8 *pmk, size_t pmk_len, const u8 *pmkid,
316 const u8 *kck, size_t kck_len, const u8 *aa,
317 const u8 *spa, int session_timeout,
318 struct eapol_state_machine *eapol, int akmp)
319 {
320 struct rsn_pmksa_cache_entry *entry;
321 struct os_reltime now;
322
323 if (pmk_len > PMK_LEN_MAX)
324 return NULL;
325
326 if (wpa_key_mgmt_suite_b(akmp) && !kck)
327 return NULL;
328
329 entry = os_zalloc(sizeof(*entry));
330 if (entry == NULL)
331 return NULL;
332 os_memcpy(entry->pmk, pmk, pmk_len);
333 entry->pmk_len = pmk_len;
334 if (pmkid)
335 os_memcpy(entry->pmkid, pmkid, PMKID_LEN);
336 else if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
337 rsn_pmkid_suite_b_192(kck, kck_len, aa, spa, entry->pmkid);
338 else if (wpa_key_mgmt_suite_b(akmp))
339 rsn_pmkid_suite_b(kck, kck_len, aa, spa, entry->pmkid);
340 else
341 rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid, akmp);
342 os_get_reltime(&now);
343 entry->expiration = now.sec;
344 if (session_timeout > 0)
345 entry->expiration += session_timeout;
346 else
347 entry->expiration += dot11RSNAConfigPMKLifetime;
348 entry->akmp = akmp;
349 os_memcpy(entry->spa, spa, ETH_ALEN);
350 pmksa_cache_from_eapol_data(entry, eapol);
351
352 return entry;
353 }
354
355
356 /**
357 * pmksa_cache_auth_add_entry - Add a PMKSA cache entry
358 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
359 * @entry: Pointer to PMKSA cache entry
360 *
361 * This function adds PMKSA cache entry to the PMKSA cache. If an old entry is
362 * already in the cache for the same Supplicant, this entry will be replaced
363 * with the new entry. PMKID will be calculated based on the PMK.
364 */
pmksa_cache_auth_add_entry(struct rsn_pmksa_cache * pmksa,struct rsn_pmksa_cache_entry * entry)365 int pmksa_cache_auth_add_entry(struct rsn_pmksa_cache *pmksa,
366 struct rsn_pmksa_cache_entry *entry)
367 {
368 struct rsn_pmksa_cache_entry *pos;
369
370 if (entry == NULL)
371 return -1;
372
373 /* Replace an old entry for the same STA (if found) with the new entry
374 */
375 pos = pmksa_cache_auth_get(pmksa, entry->spa, NULL);
376 if (pos)
377 pmksa_cache_free_entry(pmksa, pos);
378
379 if (pmksa->pmksa_count >= pmksa_cache_max_entries && pmksa->pmksa) {
380 /* Remove the oldest entry to make room for the new entry */
381 wpa_printf(MSG_DEBUG, "RSN: removed the oldest PMKSA cache "
382 "entry (for " MACSTR ") to make room for new one",
383 MAC2STR(pmksa->pmksa->spa));
384 pmksa_cache_free_entry(pmksa, pmksa->pmksa);
385 }
386
387 pmksa_cache_link_entry(pmksa, entry);
388
389 return 0;
390 }
391
392
393 struct rsn_pmksa_cache_entry *
pmksa_cache_add_okc(struct rsn_pmksa_cache * pmksa,const struct rsn_pmksa_cache_entry * old_entry,const u8 * aa,const u8 * pmkid)394 pmksa_cache_add_okc(struct rsn_pmksa_cache *pmksa,
395 const struct rsn_pmksa_cache_entry *old_entry,
396 const u8 *aa, const u8 *pmkid)
397 {
398 struct rsn_pmksa_cache_entry *entry;
399
400 entry = os_zalloc(sizeof(*entry));
401 if (entry == NULL)
402 return NULL;
403 os_memcpy(entry->pmkid, pmkid, PMKID_LEN);
404 os_memcpy(entry->pmk, old_entry->pmk, old_entry->pmk_len);
405 entry->pmk_len = old_entry->pmk_len;
406 entry->expiration = old_entry->expiration;
407 entry->akmp = old_entry->akmp;
408 os_memcpy(entry->spa, old_entry->spa, ETH_ALEN);
409 entry->opportunistic = 1;
410 if (old_entry->identity) {
411 entry->identity = os_malloc(old_entry->identity_len);
412 if (entry->identity) {
413 entry->identity_len = old_entry->identity_len;
414 os_memcpy(entry->identity, old_entry->identity,
415 old_entry->identity_len);
416 }
417 }
418 if (old_entry->cui)
419 entry->cui = wpabuf_dup(old_entry->cui);
420 #ifndef CONFIG_NO_RADIUS
421 radius_copy_class(&entry->radius_class, &old_entry->radius_class);
422 #endif /* CONFIG_NO_RADIUS */
423 entry->eap_type_authsrv = old_entry->eap_type_authsrv;
424 if (old_entry->vlan_desc) {
425 entry->vlan_desc = os_zalloc(sizeof(struct vlan_description));
426 if (entry->vlan_desc)
427 *entry->vlan_desc = *old_entry->vlan_desc;
428 } else {
429 entry->vlan_desc = NULL;
430 }
431 entry->opportunistic = 1;
432
433 pmksa_cache_link_entry(pmksa, entry);
434
435 return entry;
436 }
437
438
439 /**
440 * pmksa_cache_auth_deinit - Free all entries in PMKSA cache
441 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
442 */
pmksa_cache_auth_deinit(struct rsn_pmksa_cache * pmksa)443 void pmksa_cache_auth_deinit(struct rsn_pmksa_cache *pmksa)
444 {
445 struct rsn_pmksa_cache_entry *entry, *prev;
446 int i;
447
448 if (pmksa == NULL)
449 return;
450
451 entry = pmksa->pmksa;
452 while (entry) {
453 prev = entry;
454 entry = entry->next;
455 _pmksa_cache_free_entry(prev);
456 }
457 eloop_cancel_timeout(pmksa_cache_expire, pmksa, NULL);
458 pmksa->pmksa_count = 0;
459 pmksa->pmksa = NULL;
460 for (i = 0; i < PMKID_HASH_SIZE; i++)
461 pmksa->pmkid[i] = NULL;
462 os_free(pmksa);
463 }
464
465
466 /**
467 * pmksa_cache_auth_get - Fetch a PMKSA cache entry
468 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
469 * @spa: Supplicant address or %NULL to match any
470 * @pmkid: PMKID or %NULL to match any
471 * Returns: Pointer to PMKSA cache entry or %NULL if no match was found
472 */
473 struct rsn_pmksa_cache_entry *
pmksa_cache_auth_get(struct rsn_pmksa_cache * pmksa,const u8 * spa,const u8 * pmkid)474 pmksa_cache_auth_get(struct rsn_pmksa_cache *pmksa,
475 const u8 *spa, const u8 *pmkid)
476 {
477 struct rsn_pmksa_cache_entry *entry;
478
479 if (pmkid) {
480 for (entry = pmksa->pmkid[PMKID_HASH(pmkid)]; entry;
481 entry = entry->hnext) {
482 if ((spa == NULL ||
483 os_memcmp(entry->spa, spa, ETH_ALEN) == 0) &&
484 os_memcmp(entry->pmkid, pmkid, PMKID_LEN) == 0)
485 return entry;
486 }
487 } else {
488 for (entry = pmksa->pmksa; entry; entry = entry->next) {
489 if (spa == NULL ||
490 os_memcmp(entry->spa, spa, ETH_ALEN) == 0)
491 return entry;
492 }
493 }
494
495 return NULL;
496 }
497
498
499 /**
500 * pmksa_cache_get_okc - Fetch a PMKSA cache entry using OKC
501 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
502 * @aa: Authenticator address
503 * @spa: Supplicant address
504 * @pmkid: PMKID
505 * Returns: Pointer to PMKSA cache entry or %NULL if no match was found
506 *
507 * Use opportunistic key caching (OKC) to find a PMK for a supplicant.
508 */
pmksa_cache_get_okc(struct rsn_pmksa_cache * pmksa,const u8 * aa,const u8 * spa,const u8 * pmkid)509 struct rsn_pmksa_cache_entry * pmksa_cache_get_okc(
510 struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *spa,
511 const u8 *pmkid)
512 {
513 struct rsn_pmksa_cache_entry *entry;
514 u8 new_pmkid[PMKID_LEN];
515
516 for (entry = pmksa->pmksa; entry; entry = entry->next) {
517 if (os_memcmp(entry->spa, spa, ETH_ALEN) != 0)
518 continue;
519 rsn_pmkid(entry->pmk, entry->pmk_len, aa, spa, new_pmkid,
520 entry->akmp);
521 if (os_memcmp(new_pmkid, pmkid, PMKID_LEN) == 0)
522 return entry;
523 }
524 return NULL;
525 }
526
527
528 /**
529 * pmksa_cache_auth_init - Initialize PMKSA cache
530 * @free_cb: Callback function to be called when a PMKSA cache entry is freed
531 * @ctx: Context pointer for free_cb function
532 * Returns: Pointer to PMKSA cache data or %NULL on failure
533 */
534 struct rsn_pmksa_cache *
pmksa_cache_auth_init(void (* free_cb)(struct rsn_pmksa_cache_entry * entry,void * ctx),void * ctx)535 pmksa_cache_auth_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
536 void *ctx), void *ctx)
537 {
538 struct rsn_pmksa_cache *pmksa;
539
540 pmksa = os_zalloc(sizeof(*pmksa));
541 if (pmksa) {
542 pmksa->free_cb = free_cb;
543 pmksa->ctx = ctx;
544 }
545
546 return pmksa;
547 }
548
549
das_attr_match(struct rsn_pmksa_cache_entry * entry,struct radius_das_attrs * attr)550 static int das_attr_match(struct rsn_pmksa_cache_entry *entry,
551 struct radius_das_attrs *attr)
552 {
553 int match = 0;
554
555 if (attr->sta_addr) {
556 if (os_memcmp(attr->sta_addr, entry->spa, ETH_ALEN) != 0)
557 return 0;
558 match++;
559 }
560
561 if (attr->acct_multi_session_id) {
562 char buf[20];
563
564 if (attr->acct_multi_session_id_len != 16)
565 return 0;
566 os_snprintf(buf, sizeof(buf), "%016llX",
567 (unsigned long long) entry->acct_multi_session_id);
568 if (os_memcmp(attr->acct_multi_session_id, buf, 16) != 0)
569 return 0;
570 match++;
571 }
572
573 if (attr->cui) {
574 if (!entry->cui ||
575 attr->cui_len != wpabuf_len(entry->cui) ||
576 os_memcmp(attr->cui, wpabuf_head(entry->cui),
577 attr->cui_len) != 0)
578 return 0;
579 match++;
580 }
581
582 if (attr->user_name) {
583 if (!entry->identity ||
584 attr->user_name_len != entry->identity_len ||
585 os_memcmp(attr->user_name, entry->identity,
586 attr->user_name_len) != 0)
587 return 0;
588 match++;
589 }
590
591 return match;
592 }
593
594
pmksa_cache_auth_radius_das_disconnect(struct rsn_pmksa_cache * pmksa,struct radius_das_attrs * attr)595 int pmksa_cache_auth_radius_das_disconnect(struct rsn_pmksa_cache *pmksa,
596 struct radius_das_attrs *attr)
597 {
598 int found = 0;
599 struct rsn_pmksa_cache_entry *entry, *prev;
600
601 if (attr->acct_session_id)
602 return -1;
603
604 entry = pmksa->pmksa;
605 while (entry) {
606 if (das_attr_match(entry, attr)) {
607 found++;
608 prev = entry;
609 entry = entry->next;
610 pmksa_cache_free_entry(pmksa, prev);
611 continue;
612 }
613 entry = entry->next;
614 }
615
616 return found ? 0 : -1;
617 }
618
619
620 /**
621 * pmksa_cache_auth_list - Dump text list of entries in PMKSA cache
622 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
623 * @buf: Buffer for the list
624 * @len: Length of the buffer
625 * Returns: Number of bytes written to buffer
626 *
627 * This function is used to generate a text format representation of the
628 * current PMKSA cache contents for the ctrl_iface PMKSA command.
629 */
pmksa_cache_auth_list(struct rsn_pmksa_cache * pmksa,char * buf,size_t len)630 int pmksa_cache_auth_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len)
631 {
632 int i, ret;
633 char *pos = buf;
634 struct rsn_pmksa_cache_entry *entry;
635 struct os_reltime now;
636
637 os_get_reltime(&now);
638 ret = os_snprintf(pos, buf + len - pos,
639 "Index / SPA / PMKID / expiration (in seconds) / opportunistic\n");
640 if (os_snprintf_error(buf + len - pos, ret))
641 return pos - buf;
642 pos += ret;
643 i = 0;
644 entry = pmksa->pmksa;
645 while (entry) {
646 ret = os_snprintf(pos, buf + len - pos, "%d " MACSTR " ",
647 i, MAC2STR(entry->spa));
648 if (os_snprintf_error(buf + len - pos, ret))
649 return pos - buf;
650 pos += ret;
651 pos += wpa_snprintf_hex(pos, buf + len - pos, entry->pmkid,
652 PMKID_LEN);
653 ret = os_snprintf(pos, buf + len - pos, " %d %d\n",
654 (int) (entry->expiration - now.sec),
655 entry->opportunistic);
656 if (os_snprintf_error(buf + len - pos, ret))
657 return pos - buf;
658 pos += ret;
659 entry = entry->next;
660 }
661 return pos - buf;
662 }
663
664
665 #ifdef CONFIG_PMKSA_CACHE_EXTERNAL
666 #ifdef CONFIG_MESH
667
668 /**
669 * pmksa_cache_auth_list_mesh - Dump text list of entries in PMKSA cache
670 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_auth_init()
671 * @addr: MAC address of the peer (NULL means any)
672 * @buf: Buffer for the list
673 * @len: Length of the buffer
674 * Returns: Number of bytes written to buffer
675 *
676 * This function is used to generate a text format representation of the
677 * current PMKSA cache contents for the ctrl_iface PMKSA_GET command to store
678 * in external storage.
679 */
pmksa_cache_auth_list_mesh(struct rsn_pmksa_cache * pmksa,const u8 * addr,char * buf,size_t len)680 int pmksa_cache_auth_list_mesh(struct rsn_pmksa_cache *pmksa, const u8 *addr,
681 char *buf, size_t len)
682 {
683 int ret;
684 char *pos, *end;
685 struct rsn_pmksa_cache_entry *entry;
686 struct os_reltime now;
687
688 pos = buf;
689 end = buf + len;
690 os_get_reltime(&now);
691
692
693 /*
694 * Entry format:
695 * <BSSID> <PMKID> <PMK> <expiration in seconds>
696 */
697 for (entry = pmksa->pmksa; entry; entry = entry->next) {
698 if (addr && os_memcmp(entry->spa, addr, ETH_ALEN) != 0)
699 continue;
700
701 ret = os_snprintf(pos, end - pos, MACSTR " ",
702 MAC2STR(entry->spa));
703 if (os_snprintf_error(end - pos, ret))
704 return 0;
705 pos += ret;
706
707 pos += wpa_snprintf_hex(pos, end - pos, entry->pmkid,
708 PMKID_LEN);
709
710 ret = os_snprintf(pos, end - pos, " ");
711 if (os_snprintf_error(end - pos, ret))
712 return 0;
713 pos += ret;
714
715 pos += wpa_snprintf_hex(pos, end - pos, entry->pmk,
716 entry->pmk_len);
717
718 ret = os_snprintf(pos, end - pos, " %d\n",
719 (int) (entry->expiration - now.sec));
720 if (os_snprintf_error(end - pos, ret))
721 return 0;
722 pos += ret;
723 }
724
725 return pos - buf;
726 }
727
728 #endif /* CONFIG_MESH */
729 #endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
730