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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) \
20static 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) \
32static 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) \
39static 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) \
55static 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
65KEY_CONF_FILE(keylen, D);
66KEY_CONF_FILE(keyidx, D);
67KEY_CONF_FILE(hw_key_idx, D);
68KEY_FILE(flags, X);
69KEY_READ(ifindex, sdata->name, "%s\n");
70KEY_OPS(ifindex);
71
72static 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}
84KEY_OPS(algorithm);
85
86static 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
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
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
121static 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 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
136 key->u.tkip.tx.iv32,
137 key->u.tkip.tx.iv16);
138 break;
139 case WLAN_CIPHER_SUITE_CCMP:
140 case WLAN_CIPHER_SUITE_CCMP_256:
141 case WLAN_CIPHER_SUITE_AES_CMAC:
142 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
143 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
144 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
145 case WLAN_CIPHER_SUITE_GCMP:
146 case WLAN_CIPHER_SUITE_GCMP_256:
147 pn = atomic64_read(&key->conf.tx_pn);
148 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
149 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
150 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
151 break;
152 default:
153 return 0;
154 }
155 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
156}
157KEY_OPS_W(tx_spec);
158
159static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
160 size_t count, loff_t *ppos)
161{
162 struct ieee80211_key *key = file->private_data;
163 char buf[14*IEEE80211_NUM_TIDS+1], *p = buf;
164 int i, len;
165 const u8 *rpn;
166
167 switch (key->conf.cipher) {
168 case WLAN_CIPHER_SUITE_WEP40:
169 case WLAN_CIPHER_SUITE_WEP104:
170 len = scnprintf(buf, sizeof(buf), "\n");
171 break;
172 case WLAN_CIPHER_SUITE_TKIP:
173 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
174 p += scnprintf(p, sizeof(buf)+buf-p,
175 "%08x %04x\n",
176 key->u.tkip.rx[i].iv32,
177 key->u.tkip.rx[i].iv16);
178 len = p - buf;
179 break;
180 case WLAN_CIPHER_SUITE_CCMP:
181 case WLAN_CIPHER_SUITE_CCMP_256:
182 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
183 rpn = key->u.ccmp.rx_pn[i];
184 p += scnprintf(p, sizeof(buf)+buf-p,
185 "%02x%02x%02x%02x%02x%02x\n",
186 rpn[0], rpn[1], rpn[2],
187 rpn[3], rpn[4], rpn[5]);
188 }
189 len = p - buf;
190 break;
191 case WLAN_CIPHER_SUITE_AES_CMAC:
192 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
193 rpn = key->u.aes_cmac.rx_pn;
194 p += scnprintf(p, sizeof(buf)+buf-p,
195 "%02x%02x%02x%02x%02x%02x\n",
196 rpn[0], rpn[1], rpn[2],
197 rpn[3], rpn[4], rpn[5]);
198 len = p - buf;
199 break;
200 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
201 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
202 rpn = key->u.aes_gmac.rx_pn;
203 p += scnprintf(p, sizeof(buf)+buf-p,
204 "%02x%02x%02x%02x%02x%02x\n",
205 rpn[0], rpn[1], rpn[2],
206 rpn[3], rpn[4], rpn[5]);
207 len = p - buf;
208 break;
209 case WLAN_CIPHER_SUITE_GCMP:
210 case WLAN_CIPHER_SUITE_GCMP_256:
211 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
212 rpn = key->u.gcmp.rx_pn[i];
213 p += scnprintf(p, sizeof(buf)+buf-p,
214 "%02x%02x%02x%02x%02x%02x\n",
215 rpn[0], rpn[1], rpn[2],
216 rpn[3], rpn[4], rpn[5]);
217 }
218 len = p - buf;
219 break;
220 default:
221 return 0;
222 }
223 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
224}
225KEY_OPS(rx_spec);
226
227static ssize_t key_replays_read(struct file *file, char __user *userbuf,
228 size_t count, loff_t *ppos)
229{
230 struct ieee80211_key *key = file->private_data;
231 char buf[20];
232 int len;
233
234 switch (key->conf.cipher) {
235 case WLAN_CIPHER_SUITE_CCMP:
236 case WLAN_CIPHER_SUITE_CCMP_256:
237 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
238 break;
239 case WLAN_CIPHER_SUITE_AES_CMAC:
240 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
241 len = scnprintf(buf, sizeof(buf), "%u\n",
242 key->u.aes_cmac.replays);
243 break;
244 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
245 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
246 len = scnprintf(buf, sizeof(buf), "%u\n",
247 key->u.aes_gmac.replays);
248 break;
249 case WLAN_CIPHER_SUITE_GCMP:
250 case WLAN_CIPHER_SUITE_GCMP_256:
251 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.replays);
252 break;
253 default:
254 return 0;
255 }
256 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
257}
258KEY_OPS(replays);
259
260static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
261 size_t count, loff_t *ppos)
262{
263 struct ieee80211_key *key = file->private_data;
264 char buf[20];
265 int len;
266
267 switch (key->conf.cipher) {
268 case WLAN_CIPHER_SUITE_AES_CMAC:
269 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
270 len = scnprintf(buf, sizeof(buf), "%u\n",
271 key->u.aes_cmac.icverrors);
272 break;
273 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
274 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
275 len = scnprintf(buf, sizeof(buf), "%u\n",
276 key->u.aes_gmac.icverrors);
277 break;
278 default:
279 return 0;
280 }
281 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
282}
283KEY_OPS(icverrors);
284
285static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf,
286 size_t count, loff_t *ppos)
287{
288 struct ieee80211_key *key = file->private_data;
289 char buf[20];
290 int len;
291
292 if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)
293 return -EINVAL;
294
295 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);
296
297 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
298}
299KEY_OPS(mic_failures);
300
301static ssize_t key_key_read(struct file *file, char __user *userbuf,
302 size_t count, loff_t *ppos)
303{
304 struct ieee80211_key *key = file->private_data;
305 int i, bufsize = 2 * key->conf.keylen + 2;
306 char *buf = kmalloc(bufsize, GFP_KERNEL);
307 char *p = buf;
308 ssize_t res;
309
310 if (!buf)
311 return -ENOMEM;
312
313 for (i = 0; i < key->conf.keylen; i++)
314 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
315 p += scnprintf(p, bufsize+buf-p, "\n");
316 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
317 kfree(buf);
318 return res;
319}
320KEY_OPS(key);
321
322#define DEBUGFS_ADD(name) \
323 debugfs_create_file(#name, 0400, key->debugfs.dir, \
324 key, &key_##name##_ops);
325#define DEBUGFS_ADD_W(name) \
326 debugfs_create_file(#name, 0600, key->debugfs.dir, \
327 key, &key_##name##_ops);
328
329void ieee80211_debugfs_key_add(struct ieee80211_key *key)
330{
331 static int keycount;
332 char buf[100];
333 struct sta_info *sta;
334
335 if (!key->local->debugfs.keys)
336 return;
337
338 sprintf(buf, "%d", keycount);
339 key->debugfs.cnt = keycount;
340 keycount++;
341 key->debugfs.dir = debugfs_create_dir(buf,
342 key->local->debugfs.keys);
343
344 if (!key->debugfs.dir)
345 return;
346
347 sta = key->sta;
348 if (sta) {
349 sprintf(buf, "../../netdev:%s/stations/%pM",
350 sta->sdata->name, sta->sta.addr);
351 key->debugfs.stalink =
352 debugfs_create_symlink("station", key->debugfs.dir, buf);
353 }
354
355 DEBUGFS_ADD(keylen);
356 DEBUGFS_ADD(flags);
357 DEBUGFS_ADD(keyidx);
358 DEBUGFS_ADD(hw_key_idx);
359 DEBUGFS_ADD(algorithm);
360 DEBUGFS_ADD_W(tx_spec);
361 DEBUGFS_ADD(rx_spec);
362 DEBUGFS_ADD(replays);
363 DEBUGFS_ADD(icverrors);
364 DEBUGFS_ADD(mic_failures);
365 DEBUGFS_ADD(key);
366 DEBUGFS_ADD(ifindex);
367};
368
369void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
370{
371 if (!key)
372 return;
373
374 debugfs_remove_recursive(key->debugfs.dir);
375 key->debugfs.dir = NULL;
376}
377
378void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
379{
380 char buf[50];
381 struct ieee80211_key *key;
382
383 if (!sdata->vif.debugfs_dir)
384 return;
385
386 lockdep_assert_held(&sdata->local->key_mtx);
387
388 debugfs_remove(sdata->debugfs.default_unicast_key);
389 sdata->debugfs.default_unicast_key = NULL;
390
391 if (sdata->default_unicast_key) {
392 key = key_mtx_dereference(sdata->local,
393 sdata->default_unicast_key);
394 sprintf(buf, "../keys/%d", key->debugfs.cnt);
395 sdata->debugfs.default_unicast_key =
396 debugfs_create_symlink("default_unicast_key",
397 sdata->vif.debugfs_dir, buf);
398 }
399
400 debugfs_remove(sdata->debugfs.default_multicast_key);
401 sdata->debugfs.default_multicast_key = NULL;
402
403 if (sdata->default_multicast_key) {
404 key = key_mtx_dereference(sdata->local,
405 sdata->default_multicast_key);
406 sprintf(buf, "../keys/%d", key->debugfs.cnt);
407 sdata->debugfs.default_multicast_key =
408 debugfs_create_symlink("default_multicast_key",
409 sdata->vif.debugfs_dir, buf);
410 }
411}
412
413void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
414{
415 char buf[50];
416 struct ieee80211_key *key;
417
418 if (!sdata->vif.debugfs_dir)
419 return;
420
421 key = key_mtx_dereference(sdata->local,
422 sdata->default_mgmt_key);
423 if (key) {
424 sprintf(buf, "../keys/%d", key->debugfs.cnt);
425 sdata->debugfs.default_mgmt_key =
426 debugfs_create_symlink("default_mgmt_key",
427 sdata->vif.debugfs_dir, buf);
428 } else
429 ieee80211_debugfs_key_remove_mgmt_default(sdata);
430}
431
432void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
433{
434 if (!sdata)
435 return;
436
437 debugfs_remove(sdata->debugfs.default_mgmt_key);
438 sdata->debugfs.default_mgmt_key = NULL;
439}
440
441void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
442 struct sta_info *sta)
443{
444 debugfs_remove(key->debugfs.stalink);
445 key->debugfs.stalink = NULL;
446}
447
