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