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Linux 5.8.3
[linux/fpc-iii.git] / net / mac80211 / debugfs_key.c
blob98a713475e0f8469b64b1fa0fb8225f78cb82199
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2003-2005 Devicescape Software, Inc.
4 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright (C) 2015 Intel Deutschland GmbH
7 */
8
9 #include <linux/kobject.h>
10 #include <linux/slab.h>
11 #include "ieee80211_i.h"
12 #include "key.h"
13 #include "debugfs.h"
14 #include "debugfs_key.h"
15
16 #define KEY_READ(name, prop, format_string) \
17 static ssize_t key_##name##_read(struct file *file, \
18 char __user *userbuf, \
19 size_t count, loff_t *ppos) \
20 { \
21 struct ieee80211_key *key = file->private_data; \
22 return mac80211_format_buffer(userbuf, count, ppos, \
23 format_string, key->prop); \
24 }
25 #define KEY_READ_D(name) KEY_READ(name, name, "%d\n")
26 #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
27
28 #define KEY_OPS(name) \
29 static const struct file_operations key_ ##name## _ops = { \
30 .read = key_##name##_read, \
31 .open = simple_open, \
32 .llseek = generic_file_llseek, \
33 }
34
35 #define KEY_OPS_W(name) \
36 static const struct file_operations key_ ##name## _ops = { \
37 .read = key_##name##_read, \
38 .write = key_##name##_write, \
39 .open = simple_open, \
40 .llseek = generic_file_llseek, \
41 }
42
43 #define KEY_FILE(name, format) \
44 KEY_READ_##format(name) \
45 KEY_OPS(name)
46
47 #define KEY_CONF_READ(name, format_string) \
48 KEY_READ(conf_##name, conf.name, format_string)
49 #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n")
50
51 #define KEY_CONF_OPS(name) \
52 static const struct file_operations key_ ##name## _ops = { \
53 .read = key_conf_##name##_read, \
54 .open = simple_open, \
55 .llseek = generic_file_llseek, \
56 }
57
58 #define KEY_CONF_FILE(name, format) \
59 KEY_CONF_READ_##format(name) \
60 KEY_CONF_OPS(name)
61
62 KEY_CONF_FILE(keylen, D);
63 KEY_CONF_FILE(keyidx, D);
64 KEY_CONF_FILE(hw_key_idx, D);
65 KEY_FILE(flags, X);
66 KEY_READ(ifindex, sdata->name, "%s\n");
67 KEY_OPS(ifindex);
68
69 static ssize_t key_algorithm_read(struct file *file,
70 char __user *userbuf,
71 size_t count, loff_t *ppos)
72 {
73 char buf[15];
74 struct ieee80211_key *key = file->private_data;
75 u32 c = key->conf.cipher;
76
77 sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
78 c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
79 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
80 }
81 KEY_OPS(algorithm);
82
83 static ssize_t key_tx_spec_write(struct file *file, const char __user *userbuf,
84 size_t count, loff_t *ppos)
85 {
86 struct ieee80211_key *key = file->private_data;
87 u64 pn;
88 int ret;
89
90 switch (key->conf.cipher) {
91 case WLAN_CIPHER_SUITE_WEP40:
92 case WLAN_CIPHER_SUITE_WEP104:
93 return -EINVAL;
94 case WLAN_CIPHER_SUITE_TKIP:
95 /* not supported yet */
96 return -EOPNOTSUPP;
97 case WLAN_CIPHER_SUITE_CCMP:
98 case WLAN_CIPHER_SUITE_CCMP_256:
99 case WLAN_CIPHER_SUITE_AES_CMAC:
100 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
101 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
102 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
103 case WLAN_CIPHER_SUITE_GCMP:
104 case WLAN_CIPHER_SUITE_GCMP_256:
105 ret = kstrtou64_from_user(userbuf, count, 16, &pn);
106 if (ret)
107 return ret;
108 /* PN is a 48-bit counter */
109 if (pn >= (1ULL << 48))
110 return -ERANGE;
111 atomic64_set(&key->conf.tx_pn, pn);
112 return count;
113 default:
114 return 0;
115 }
116 }
117
118 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
119 size_t count, loff_t *ppos)
120 {
121 u64 pn;
122 char buf[20];
123 int len;
124 struct ieee80211_key *key = file->private_data;
125
126 switch (key->conf.cipher) {
127 case WLAN_CIPHER_SUITE_WEP40:
128 case WLAN_CIPHER_SUITE_WEP104:
129 len = scnprintf(buf, sizeof(buf), "\n");
130 break;
131 case WLAN_CIPHER_SUITE_TKIP:
132 pn = atomic64_read(&key->conf.tx_pn);
133 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
134 TKIP_PN_TO_IV32(pn),
135 TKIP_PN_TO_IV16(pn));
136 break;
137 case WLAN_CIPHER_SUITE_CCMP:
138 case WLAN_CIPHER_SUITE_CCMP_256:
139 case WLAN_CIPHER_SUITE_AES_CMAC:
140 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
141 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
142 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
143 case WLAN_CIPHER_SUITE_GCMP:
144 case WLAN_CIPHER_SUITE_GCMP_256:
145 pn = atomic64_read(&key->conf.tx_pn);
146 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
147 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
148 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
149 break;
150 default:
151 return 0;
152 }
153 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
154 }
155 KEY_OPS_W(tx_spec);
156
157 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
158 size_t count, loff_t *ppos)
159 {
160 struct ieee80211_key *key = file->private_data;
161 char buf[14*IEEE80211_NUM_TIDS+1], *p = buf;
162 int i, len;
163 const u8 *rpn;
164
165 switch (key->conf.cipher) {
166 case WLAN_CIPHER_SUITE_WEP40:
167 case WLAN_CIPHER_SUITE_WEP104:
168 len = scnprintf(buf, sizeof(buf), "\n");
169 break;
170 case WLAN_CIPHER_SUITE_TKIP:
171 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
172 p += scnprintf(p, sizeof(buf)+buf-p,
173 "%08x %04x\n",
174 key->u.tkip.rx[i].iv32,
175 key->u.tkip.rx[i].iv16);
176 len = p - buf;
177 break;
178 case WLAN_CIPHER_SUITE_CCMP:
179 case WLAN_CIPHER_SUITE_CCMP_256:
180 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
181 rpn = key->u.ccmp.rx_pn[i];
182 p += scnprintf(p, sizeof(buf)+buf-p,
183 "%02x%02x%02x%02x%02x%02x\n",
184 rpn[0], rpn[1], rpn[2],
185 rpn[3], rpn[4], rpn[5]);
186 }
187 len = p - buf;
188 break;
189 case WLAN_CIPHER_SUITE_AES_CMAC:
190 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
191 rpn = key->u.aes_cmac.rx_pn;
192 p += scnprintf(p, sizeof(buf)+buf-p,
193 "%02x%02x%02x%02x%02x%02x\n",
194 rpn[0], rpn[1], rpn[2],
195 rpn[3], rpn[4], rpn[5]);
196 len = p - buf;
197 break;
198 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
199 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
200 rpn = key->u.aes_gmac.rx_pn;
201 p += scnprintf(p, sizeof(buf)+buf-p,
202 "%02x%02x%02x%02x%02x%02x\n",
203 rpn[0], rpn[1], rpn[2],
204 rpn[3], rpn[4], rpn[5]);
205 len = p - buf;
206 break;
207 case WLAN_CIPHER_SUITE_GCMP:
208 case WLAN_CIPHER_SUITE_GCMP_256:
209 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
210 rpn = key->u.gcmp.rx_pn[i];
211 p += scnprintf(p, sizeof(buf)+buf-p,
212 "%02x%02x%02x%02x%02x%02x\n",
213 rpn[0], rpn[1], rpn[2],
214 rpn[3], rpn[4], rpn[5]);
215 }
216 len = p - buf;
217 break;
218 default:
219 return 0;
220 }
221 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
222 }
223 KEY_OPS(rx_spec);
224
225 static ssize_t key_replays_read(struct file *file, char __user *userbuf,
226 size_t count, loff_t *ppos)
227 {
228 struct ieee80211_key *key = file->private_data;
229 char buf[20];
230 int len;
231
232 switch (key->conf.cipher) {
233 case WLAN_CIPHER_SUITE_CCMP:
234 case WLAN_CIPHER_SUITE_CCMP_256:
235 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
236 break;
237 case WLAN_CIPHER_SUITE_AES_CMAC:
238 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
239 len = scnprintf(buf, sizeof(buf), "%u\n",
240 key->u.aes_cmac.replays);
241 break;
242 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
243 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
244 len = scnprintf(buf, sizeof(buf), "%u\n",
245 key->u.aes_gmac.replays);
246 break;
247 case WLAN_CIPHER_SUITE_GCMP:
248 case WLAN_CIPHER_SUITE_GCMP_256:
249 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.replays);
250 break;
251 default:
252 return 0;
253 }
254 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
255 }
256 KEY_OPS(replays);
257
258 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
259 size_t count, loff_t *ppos)
260 {
261 struct ieee80211_key *key = file->private_data;
262 char buf[20];
263 int len;
264
265 switch (key->conf.cipher) {
266 case WLAN_CIPHER_SUITE_AES_CMAC:
267 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
268 len = scnprintf(buf, sizeof(buf), "%u\n",
269 key->u.aes_cmac.icverrors);
270 break;
271 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
272 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
273 len = scnprintf(buf, sizeof(buf), "%u\n",
274 key->u.aes_gmac.icverrors);
275 break;
276 default:
277 return 0;
278 }
279 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
280 }
281 KEY_OPS(icverrors);
282
283 static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf,
284 size_t count, loff_t *ppos)
285 {
286 struct ieee80211_key *key = file->private_data;
287 char buf[20];
288 int len;
289
290 if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)
291 return -EINVAL;
292
293 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);
294
295 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
296 }
297 KEY_OPS(mic_failures);
298
299 static ssize_t key_key_read(struct file *file, char __user *userbuf,
300 size_t count, loff_t *ppos)
301 {
302 struct ieee80211_key *key = file->private_data;
303 int i, bufsize = 2 * key->conf.keylen + 2;
304 char *buf = kmalloc(bufsize, GFP_KERNEL);
305 char *p = buf;
306 ssize_t res;
307
308 if (!buf)
309 return -ENOMEM;
310
311 for (i = 0; i < key->conf.keylen; i++)
312 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
313 p += scnprintf(p, bufsize+buf-p, "\n");
314 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
315 kfree(buf);
316 return res;
317 }
318 KEY_OPS(key);
319
320 #define DEBUGFS_ADD(name) \
321 debugfs_create_file(#name, 0400, key->debugfs.dir, \
322 key, &key_##name##_ops);
323 #define DEBUGFS_ADD_W(name) \
324 debugfs_create_file(#name, 0600, key->debugfs.dir, \
325 key, &key_##name##_ops);
326
327 void ieee80211_debugfs_key_add(struct ieee80211_key *key)
328 {
329 static int keycount;
330 char buf[100];
331 struct sta_info *sta;
332
333 if (!key->local->debugfs.keys)
334 return;
335
336 sprintf(buf, "%d", keycount);
337 key->debugfs.cnt = keycount;
338 keycount++;
339 key->debugfs.dir = debugfs_create_dir(buf,
340 key->local->debugfs.keys);
341
342 sta = key->sta;
343 if (sta) {
344 sprintf(buf, "../../netdev:%s/stations/%pM",
345 sta->sdata->name, sta->sta.addr);
346 key->debugfs.stalink =
347 debugfs_create_symlink("station", key->debugfs.dir, buf);
348 }
349
350 DEBUGFS_ADD(keylen);
351 DEBUGFS_ADD(flags);
352 DEBUGFS_ADD(keyidx);
353 DEBUGFS_ADD(hw_key_idx);
354 DEBUGFS_ADD(algorithm);
355 DEBUGFS_ADD_W(tx_spec);
356 DEBUGFS_ADD(rx_spec);
357 DEBUGFS_ADD(replays);
358 DEBUGFS_ADD(icverrors);
359 DEBUGFS_ADD(mic_failures);
360 DEBUGFS_ADD(key);
361 DEBUGFS_ADD(ifindex);
362 };
363
364 void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
365 {
366 if (!key)
367 return;
368
369 debugfs_remove_recursive(key->debugfs.dir);
370 key->debugfs.dir = NULL;
371 }
372
373 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
374 {
375 char buf[50];
376 struct ieee80211_key *key;
377
378 if (!sdata->vif.debugfs_dir)
379 return;
380
381 lockdep_assert_held(&sdata->local->key_mtx);
382
383 debugfs_remove(sdata->debugfs.default_unicast_key);
384 sdata->debugfs.default_unicast_key = NULL;
385
386 if (sdata->default_unicast_key) {
387 key = key_mtx_dereference(sdata->local,
388 sdata->default_unicast_key);
389 sprintf(buf, "../keys/%d", key->debugfs.cnt);
390 sdata->debugfs.default_unicast_key =
391 debugfs_create_symlink("default_unicast_key",
392 sdata->vif.debugfs_dir, buf);
393 }
394
395 debugfs_remove(sdata->debugfs.default_multicast_key);
396 sdata->debugfs.default_multicast_key = NULL;
397
398 if (sdata->default_multicast_key) {
399 key = key_mtx_dereference(sdata->local,
400 sdata->default_multicast_key);
401 sprintf(buf, "../keys/%d", key->debugfs.cnt);
402 sdata->debugfs.default_multicast_key =
403 debugfs_create_symlink("default_multicast_key",
404 sdata->vif.debugfs_dir, buf);
405 }
406 }
407
408 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
409 {
410 char buf[50];
411 struct ieee80211_key *key;
412
413 if (!sdata->vif.debugfs_dir)
414 return;
415
416 key = key_mtx_dereference(sdata->local,
417 sdata->default_mgmt_key);
418 if (key) {
419 sprintf(buf, "../keys/%d", key->debugfs.cnt);
420 sdata->debugfs.default_mgmt_key =
421 debugfs_create_symlink("default_mgmt_key",
422 sdata->vif.debugfs_dir, buf);
423 } else
424 ieee80211_debugfs_key_remove_mgmt_default(sdata);
425 }
426
427 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
428 {
429 if (!sdata)
430 return;
431
432 debugfs_remove(sdata->debugfs.default_mgmt_key);
433 sdata->debugfs.default_mgmt_key = NULL;
434 }
435
436 void
437 ieee80211_debugfs_key_add_beacon_default(struct ieee80211_sub_if_data *sdata)
438 {
439 char buf[50];
440 struct ieee80211_key *key;
441
442 if (!sdata->vif.debugfs_dir)
443 return;
444
445 key = key_mtx_dereference(sdata->local,
446 sdata->default_beacon_key);
447 if (key) {
448 sprintf(buf, "../keys/%d", key->debugfs.cnt);
449 sdata->debugfs.default_beacon_key =
450 debugfs_create_symlink("default_beacon_key",
451 sdata->vif.debugfs_dir, buf);
452 } else {
453 ieee80211_debugfs_key_remove_beacon_default(sdata);
454 }
455 }
456
457 void
458 ieee80211_debugfs_key_remove_beacon_default(struct ieee80211_sub_if_data *sdata)
459 {
460 if (!sdata)
461 return;
462
463 debugfs_remove(sdata->debugfs.default_beacon_key);
464 sdata->debugfs.default_beacon_key = NULL;
465 }
466
467 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
468 struct sta_info *sta)
469 {
470 debugfs_remove(key->debugfs.stalink);
471 key->debugfs.stalink = NULL;
472 }
Linux with added FPC-III support