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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / net / mac80211 / debugfs_key.c
bloba2ef95f16f116ae905049c595742bcee3e78c6c7
1 /*
2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright (C) 2015 Intel Deutschland GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/kobject.h>
13 #include <linux/slab.h>
14 #include "ieee80211_i.h"
15 #include "key.h"
16 #include "debugfs.h"
17 #include "debugfs_key.h"
18
19 #define KEY_READ(name, prop, format_string) \
20 static ssize_t key_##name##_read(struct file *file, \
21 char __user *userbuf, \
22 size_t count, loff_t *ppos) \
23 { \
24 struct ieee80211_key *key = file->private_data; \
25 return mac80211_format_buffer(userbuf, count, ppos, \
26 format_string, key->prop); \
27 }
28 #define KEY_READ_D(name) KEY_READ(name, name, "%d\n")
29 #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
30
31 #define KEY_OPS(name) \
32 static const struct file_operations key_ ##name## _ops = { \
33 .read = key_##name##_read, \
34 .open = simple_open, \
35 .llseek = generic_file_llseek, \
36 }
37
38 #define KEY_OPS_W(name) \
39 static const struct file_operations key_ ##name## _ops = { \
40 .read = key_##name##_read, \
41 .write = key_##name##_write, \
42 .open = simple_open, \
43 .llseek = generic_file_llseek, \
44 }
45
46 #define KEY_FILE(name, format) \
47 KEY_READ_##format(name) \
48 KEY_OPS(name)
49
50 #define KEY_CONF_READ(name, format_string) \
51 KEY_READ(conf_##name, conf.name, format_string)
52 #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n")
53
54 #define KEY_CONF_OPS(name) \
55 static const struct file_operations key_ ##name## _ops = { \
56 .read = key_conf_##name##_read, \
57 .open = simple_open, \
58 .llseek = generic_file_llseek, \
59 }
60
61 #define KEY_CONF_FILE(name, format) \
62 KEY_CONF_READ_##format(name) \
63 KEY_CONF_OPS(name)
64
65 KEY_CONF_FILE(keylen, D);
66 KEY_CONF_FILE(keyidx, D);
67 KEY_CONF_FILE(hw_key_idx, D);
68 KEY_FILE(flags, X);
69 KEY_READ(ifindex, sdata->name, "%s\n");
70 KEY_OPS(ifindex);
71
72 static ssize_t key_algorithm_read(struct file *file,
73 char __user *userbuf,
74 size_t count, loff_t *ppos)
75 {
76 char buf[15];
77 struct ieee80211_key *key = file->private_data;
78 u32 c = key->conf.cipher;
79
80 sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
81 c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
82 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
83 }
84 KEY_OPS(algorithm);
85
86 static ssize_t key_tx_spec_write(struct file *file, const char __user *userbuf,
87 size_t count, loff_t *ppos)
88 {
89 struct ieee80211_key *key = file->private_data;
90 u64 pn;
91 int ret;
92
93 switch (key->conf.cipher) {
94 case WLAN_CIPHER_SUITE_WEP40:
95 case WLAN_CIPHER_SUITE_WEP104:
96 return -EINVAL;
97 case WLAN_CIPHER_SUITE_TKIP:
98 /* not supported yet */
99 return -EOPNOTSUPP;
100 case WLAN_CIPHER_SUITE_CCMP:
101 case WLAN_CIPHER_SUITE_CCMP_256:
102 case WLAN_CIPHER_SUITE_AES_CMAC:
103 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
104 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
105 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
106 case WLAN_CIPHER_SUITE_GCMP:
107 case WLAN_CIPHER_SUITE_GCMP_256:
108 ret = kstrtou64_from_user(userbuf, count, 16, &pn);
109 if (ret)
110 return ret;
111 /* PN is a 48-bit counter */
112 if (pn >= (1ULL << 48))
113 return -ERANGE;
114 atomic64_set(&key->conf.tx_pn, pn);
115 return count;
116 default:
117 return 0;
118 }
119 }
120
121 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
122 size_t count, loff_t *ppos)
123 {
124 u64 pn;
125 char buf[20];
126 int len;
127 struct ieee80211_key *key = file->private_data;
128
129 switch (key->conf.cipher) {
130 case WLAN_CIPHER_SUITE_WEP40:
131 case WLAN_CIPHER_SUITE_WEP104:
132 len = scnprintf(buf, sizeof(buf), "\n");
133 break;
134 case WLAN_CIPHER_SUITE_TKIP:
135 pn = atomic64_read(&key->conf.tx_pn);
136 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
137 TKIP_PN_TO_IV32(pn),
138 TKIP_PN_TO_IV16(pn));
139 break;
140 case WLAN_CIPHER_SUITE_CCMP:
141 case WLAN_CIPHER_SUITE_CCMP_256:
142 case WLAN_CIPHER_SUITE_AES_CMAC:
143 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
144 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
145 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
146 case WLAN_CIPHER_SUITE_GCMP:
147 case WLAN_CIPHER_SUITE_GCMP_256:
148 pn = atomic64_read(&key->conf.tx_pn);
149 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
150 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
151 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
152 break;
153 default:
154 return 0;
155 }
156 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
157 }
158 KEY_OPS_W(tx_spec);
159
160 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
161 size_t count, loff_t *ppos)
162 {
163 struct ieee80211_key *key = file->private_data;
164 char buf[14*IEEE80211_NUM_TIDS+1], *p = buf;
165 int i, len;
166 const u8 *rpn;
167
168 switch (key->conf.cipher) {
169 case WLAN_CIPHER_SUITE_WEP40:
170 case WLAN_CIPHER_SUITE_WEP104:
171 len = scnprintf(buf, sizeof(buf), "\n");
172 break;
173 case WLAN_CIPHER_SUITE_TKIP:
174 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
175 p += scnprintf(p, sizeof(buf)+buf-p,
176 "%08x %04x\n",
177 key->u.tkip.rx[i].iv32,
178 key->u.tkip.rx[i].iv16);
179 len = p - buf;
180 break;
181 case WLAN_CIPHER_SUITE_CCMP:
182 case WLAN_CIPHER_SUITE_CCMP_256:
183 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
184 rpn = key->u.ccmp.rx_pn[i];
185 p += scnprintf(p, sizeof(buf)+buf-p,
186 "%02x%02x%02x%02x%02x%02x\n",
187 rpn[0], rpn[1], rpn[2],
188 rpn[3], rpn[4], rpn[5]);
189 }
190 len = p - buf;
191 break;
192 case WLAN_CIPHER_SUITE_AES_CMAC:
193 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
194 rpn = key->u.aes_cmac.rx_pn;
195 p += scnprintf(p, sizeof(buf)+buf-p,
196 "%02x%02x%02x%02x%02x%02x\n",
197 rpn[0], rpn[1], rpn[2],
198 rpn[3], rpn[4], rpn[5]);
199 len = p - buf;
200 break;
201 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
202 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
203 rpn = key->u.aes_gmac.rx_pn;
204 p += scnprintf(p, sizeof(buf)+buf-p,
205 "%02x%02x%02x%02x%02x%02x\n",
206 rpn[0], rpn[1], rpn[2],
207 rpn[3], rpn[4], rpn[5]);
208 len = p - buf;
209 break;
210 case WLAN_CIPHER_SUITE_GCMP:
211 case WLAN_CIPHER_SUITE_GCMP_256:
212 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
213 rpn = key->u.gcmp.rx_pn[i];
214 p += scnprintf(p, sizeof(buf)+buf-p,
215 "%02x%02x%02x%02x%02x%02x\n",
216 rpn[0], rpn[1], rpn[2],
217 rpn[3], rpn[4], rpn[5]);
218 }
219 len = p - buf;
220 break;
221 default:
222 return 0;
223 }
224 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
225 }
226 KEY_OPS(rx_spec);
227
228 static ssize_t key_replays_read(struct file *file, char __user *userbuf,
229 size_t count, loff_t *ppos)
230 {
231 struct ieee80211_key *key = file->private_data;
232 char buf[20];
233 int len;
234
235 switch (key->conf.cipher) {
236 case WLAN_CIPHER_SUITE_CCMP:
237 case WLAN_CIPHER_SUITE_CCMP_256:
238 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
239 break;
240 case WLAN_CIPHER_SUITE_AES_CMAC:
241 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
242 len = scnprintf(buf, sizeof(buf), "%u\n",
243 key->u.aes_cmac.replays);
244 break;
245 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
246 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
247 len = scnprintf(buf, sizeof(buf), "%u\n",
248 key->u.aes_gmac.replays);
249 break;
250 case WLAN_CIPHER_SUITE_GCMP:
251 case WLAN_CIPHER_SUITE_GCMP_256:
252 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.replays);
253 break;
254 default:
255 return 0;
256 }
257 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
258 }
259 KEY_OPS(replays);
260
261 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
262 size_t count, loff_t *ppos)
263 {
264 struct ieee80211_key *key = file->private_data;
265 char buf[20];
266 int len;
267
268 switch (key->conf.cipher) {
269 case WLAN_CIPHER_SUITE_AES_CMAC:
270 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
271 len = scnprintf(buf, sizeof(buf), "%u\n",
272 key->u.aes_cmac.icverrors);
273 break;
274 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
275 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
276 len = scnprintf(buf, sizeof(buf), "%u\n",
277 key->u.aes_gmac.icverrors);
278 break;
279 default:
280 return 0;
281 }
282 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
283 }
284 KEY_OPS(icverrors);
285
286 static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf,
287 size_t count, loff_t *ppos)
288 {
289 struct ieee80211_key *key = file->private_data;
290 char buf[20];
291 int len;
292
293 if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)
294 return -EINVAL;
295
296 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);
297
298 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
299 }
300 KEY_OPS(mic_failures);
301
302 static ssize_t key_key_read(struct file *file, char __user *userbuf,
303 size_t count, loff_t *ppos)
304 {
305 struct ieee80211_key *key = file->private_data;
306 int i, bufsize = 2 * key->conf.keylen + 2;
307 char *buf = kmalloc(bufsize, GFP_KERNEL);
308 char *p = buf;
309 ssize_t res;
310
311 if (!buf)
312 return -ENOMEM;
313
314 for (i = 0; i < key->conf.keylen; i++)
315 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
316 p += scnprintf(p, bufsize+buf-p, "\n");
317 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
318 kfree(buf);
319 return res;
320 }
321 KEY_OPS(key);
322
323 #define DEBUGFS_ADD(name) \
324 debugfs_create_file(#name, 0400, key->debugfs.dir, \
325 key, &key_##name##_ops);
326 #define DEBUGFS_ADD_W(name) \
327 debugfs_create_file(#name, 0600, key->debugfs.dir, \
328 key, &key_##name##_ops);
329
330 void ieee80211_debugfs_key_add(struct ieee80211_key *key)
331 {
332 static int keycount;
333 char buf[100];
334 struct sta_info *sta;
335
336 if (!key->local->debugfs.keys)
337 return;
338
339 sprintf(buf, "%d", keycount);
340 key->debugfs.cnt = keycount;
341 keycount++;
342 key->debugfs.dir = debugfs_create_dir(buf,
343 key->local->debugfs.keys);
344
345 if (!key->debugfs.dir)
346 return;
347
348 sta = key->sta;
349 if (sta) {
350 sprintf(buf, "../../netdev:%s/stations/%pM",
351 sta->sdata->name, sta->sta.addr);
352 key->debugfs.stalink =
353 debugfs_create_symlink("station", key->debugfs.dir, buf);
354 }
355
356 DEBUGFS_ADD(keylen);
357 DEBUGFS_ADD(flags);
358 DEBUGFS_ADD(keyidx);
359 DEBUGFS_ADD(hw_key_idx);
360 DEBUGFS_ADD(algorithm);
361 DEBUGFS_ADD_W(tx_spec);
362 DEBUGFS_ADD(rx_spec);
363 DEBUGFS_ADD(replays);
364 DEBUGFS_ADD(icverrors);
365 DEBUGFS_ADD(mic_failures);
366 DEBUGFS_ADD(key);
367 DEBUGFS_ADD(ifindex);
368 };
369
370 void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
371 {
372 if (!key)
373 return;
374
375 debugfs_remove_recursive(key->debugfs.dir);
376 key->debugfs.dir = NULL;
377 }
378
379 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
380 {
381 char buf[50];
382 struct ieee80211_key *key;
383
384 if (!sdata->vif.debugfs_dir)
385 return;
386
387 lockdep_assert_held(&sdata->local->key_mtx);
388
389 debugfs_remove(sdata->debugfs.default_unicast_key);
390 sdata->debugfs.default_unicast_key = NULL;
391
392 if (sdata->default_unicast_key) {
393 key = key_mtx_dereference(sdata->local,
394 sdata->default_unicast_key);
395 sprintf(buf, "../keys/%d", key->debugfs.cnt);
396 sdata->debugfs.default_unicast_key =
397 debugfs_create_symlink("default_unicast_key",
398 sdata->vif.debugfs_dir, buf);
399 }
400
401 debugfs_remove(sdata->debugfs.default_multicast_key);
402 sdata->debugfs.default_multicast_key = NULL;
403
404 if (sdata->default_multicast_key) {
405 key = key_mtx_dereference(sdata->local,
406 sdata->default_multicast_key);
407 sprintf(buf, "../keys/%d", key->debugfs.cnt);
408 sdata->debugfs.default_multicast_key =
409 debugfs_create_symlink("default_multicast_key",
410 sdata->vif.debugfs_dir, buf);
411 }
412 }
413
414 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
415 {
416 char buf[50];
417 struct ieee80211_key *key;
418
419 if (!sdata->vif.debugfs_dir)
420 return;
421
422 key = key_mtx_dereference(sdata->local,
423 sdata->default_mgmt_key);
424 if (key) {
425 sprintf(buf, "../keys/%d", key->debugfs.cnt);
426 sdata->debugfs.default_mgmt_key =
427 debugfs_create_symlink("default_mgmt_key",
428 sdata->vif.debugfs_dir, buf);
429 } else
430 ieee80211_debugfs_key_remove_mgmt_default(sdata);
431 }
432
433 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
434 {
435 if (!sdata)
436 return;
437
438 debugfs_remove(sdata->debugfs.default_mgmt_key);
439 sdata->debugfs.default_mgmt_key = NULL;
440 }
441
442 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
443 struct sta_info *sta)
444 {
445 debugfs_remove(key->debugfs.stalink);
446 key->debugfs.stalink = NULL;
447 }
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