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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_FILE(tx_rx_count, D);
61KEY_READ(ifindex, sdata->name, "%s\n");
62KEY_OPS(ifindex);
63
64static ssize_t key_algorithm_read(struct file *file,
65 char __user *userbuf,
66 size_t count, loff_t *ppos)
67{
68 char buf[15];
69 struct ieee80211_key *key = file->private_data;
70 u32 c = key->conf.cipher;
71
72 sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
73 c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
74 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
75}
76KEY_OPS(algorithm);
77
78static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
79 size_t count, loff_t *ppos)
80{
81 u64 pn;
82 char buf[20];
83 int len;
84 struct ieee80211_key *key = file->private_data;
85
86 switch (key->conf.cipher) {
87 case WLAN_CIPHER_SUITE_WEP40:
88 case WLAN_CIPHER_SUITE_WEP104:
89 len = scnprintf(buf, sizeof(buf), "\n");
90 break;
91 case WLAN_CIPHER_SUITE_TKIP:
92 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
93 key->u.tkip.tx.iv32,
94 key->u.tkip.tx.iv16);
95 break;
96 case WLAN_CIPHER_SUITE_CCMP:
97 pn = atomic64_read(&key->u.ccmp.tx_pn);
98 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
99 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
100 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
101 break;
102 case WLAN_CIPHER_SUITE_AES_CMAC:
103 pn = atomic64_read(&key->u.aes_cmac.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 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
138 rpn = key->u.ccmp.rx_pn[i];
139 p += scnprintf(p, sizeof(buf)+buf-p,
140 "%02x%02x%02x%02x%02x%02x\n",
141 rpn[0], rpn[1], rpn[2],
142 rpn[3], rpn[4], rpn[5]);
143 }
144 len = p - buf;
145 break;
146 case WLAN_CIPHER_SUITE_AES_CMAC:
147 rpn = key->u.aes_cmac.rx_pn;
148 p += scnprintf(p, sizeof(buf)+buf-p,
149 "%02x%02x%02x%02x%02x%02x\n",
150 rpn[0], rpn[1], rpn[2],
151 rpn[3], rpn[4], rpn[5]);
152 len = p - buf;
153 break;
154 default:
155 return 0;
156 }
157 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
158}
159KEY_OPS(rx_spec);
160
161static ssize_t key_replays_read(struct file *file, char __user *userbuf,
162 size_t count, loff_t *ppos)
163{
164 struct ieee80211_key *key = file->private_data;
165 char buf[20];
166 int len;
167
168 switch (key->conf.cipher) {
169 case WLAN_CIPHER_SUITE_CCMP:
170 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
171 break;
172 case WLAN_CIPHER_SUITE_AES_CMAC:
173 len = scnprintf(buf, sizeof(buf), "%u\n",
174 key->u.aes_cmac.replays);
175 break;
176 default:
177 return 0;
178 }
179 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
180}
181KEY_OPS(replays);
182
183static ssize_t key_icverrors_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_AES_CMAC:
192 len = scnprintf(buf, sizeof(buf), "%u\n",
193 key->u.aes_cmac.icverrors);
194 break;
195 default:
196 return 0;
197 }
198 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
199}
200KEY_OPS(icverrors);
201
202static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf,
203 size_t count, loff_t *ppos)
204{
205 struct ieee80211_key *key = file->private_data;
206 char buf[20];
207 int len;
208
209 if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)
210 return -EINVAL;
211
212 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);
213
214 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
215}
216KEY_OPS(mic_failures);
217
218static ssize_t key_key_read(struct file *file, char __user *userbuf,
219 size_t count, loff_t *ppos)
220{
221 struct ieee80211_key *key = file->private_data;
222 int i, bufsize = 2 * key->conf.keylen + 2;
223 char *buf = kmalloc(bufsize, GFP_KERNEL);
224 char *p = buf;
225 ssize_t res;
226
227 if (!buf)
228 return -ENOMEM;
229
230 for (i = 0; i < key->conf.keylen; i++)
231 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
232 p += scnprintf(p, bufsize+buf-p, "\n");
233 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
234 kfree(buf);
235 return res;
236}
237KEY_OPS(key);
238
239#define DEBUGFS_ADD(name) \
240 debugfs_create_file(#name, 0400, key->debugfs.dir, \
241 key, &key_##name##_ops);
242
243void ieee80211_debugfs_key_add(struct ieee80211_key *key)
244{
245 static int keycount;
246 char buf[100];
247 struct sta_info *sta;
248
249 if (!key->local->debugfs.keys)
250 return;
251
252 sprintf(buf, "%d", keycount);
253 key->debugfs.cnt = keycount;
254 keycount++;
255 key->debugfs.dir = debugfs_create_dir(buf,
256 key->local->debugfs.keys);
257
258 if (!key->debugfs.dir)
259 return;
260
261 sta = key->sta;
262 if (sta) {
263 sprintf(buf, "../../netdev:%s/stations/%pM",
264 sta->sdata->name, sta->sta.addr);
265 key->debugfs.stalink =
266 debugfs_create_symlink("station", key->debugfs.dir, buf);
267 }
268
269 DEBUGFS_ADD(keylen);
270 DEBUGFS_ADD(flags);
271 DEBUGFS_ADD(keyidx);
272 DEBUGFS_ADD(hw_key_idx);
273 DEBUGFS_ADD(tx_rx_count);
274 DEBUGFS_ADD(algorithm);
275 DEBUGFS_ADD(tx_spec);
276 DEBUGFS_ADD(rx_spec);
277 DEBUGFS_ADD(replays);
278 DEBUGFS_ADD(icverrors);
279 DEBUGFS_ADD(mic_failures);
280 DEBUGFS_ADD(key);
281 DEBUGFS_ADD(ifindex);
282};
283
284void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
285{
286 if (!key)
287 return;
288
289 debugfs_remove_recursive(key->debugfs.dir);
290 key->debugfs.dir = NULL;
291}
292
293void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
294{
295 char buf[50];
296 struct ieee80211_key *key;
297
298 if (!sdata->vif.debugfs_dir)
299 return;
300
301 lockdep_assert_held(&sdata->local->key_mtx);
302
303 if (sdata->debugfs.default_unicast_key) {
304 debugfs_remove(sdata->debugfs.default_unicast_key);
305 sdata->debugfs.default_unicast_key = NULL;
306 }
307
308 if (sdata->default_unicast_key) {
309 key = key_mtx_dereference(sdata->local,
310 sdata->default_unicast_key);
311 sprintf(buf, "../keys/%d", key->debugfs.cnt);
312 sdata->debugfs.default_unicast_key =
313 debugfs_create_symlink("default_unicast_key",
314 sdata->vif.debugfs_dir, buf);
315 }
316
317 if (sdata->debugfs.default_multicast_key) {
318 debugfs_remove(sdata->debugfs.default_multicast_key);
319 sdata->debugfs.default_multicast_key = NULL;
320 }
321
322 if (sdata->default_multicast_key) {
323 key = key_mtx_dereference(sdata->local,
324 sdata->default_multicast_key);
325 sprintf(buf, "../keys/%d", key->debugfs.cnt);
326 sdata->debugfs.default_multicast_key =
327 debugfs_create_symlink("default_multicast_key",
328 sdata->vif.debugfs_dir, buf);
329 }
330}
331
332void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
333{
334 char buf[50];
335 struct ieee80211_key *key;
336
337 if (!sdata->vif.debugfs_dir)
338 return;
339
340 key = key_mtx_dereference(sdata->local,
341 sdata->default_mgmt_key);
342 if (key) {
343 sprintf(buf, "../keys/%d", key->debugfs.cnt);
344 sdata->debugfs.default_mgmt_key =
345 debugfs_create_symlink("default_mgmt_key",
346 sdata->vif.debugfs_dir, buf);
347 } else
348 ieee80211_debugfs_key_remove_mgmt_default(sdata);
349}
350
351void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
352{
353 if (!sdata)
354 return;
355
356 debugfs_remove(sdata->debugfs.default_mgmt_key);
357 sdata->debugfs.default_mgmt_key = NULL;
358}
359
360void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
361 struct sta_info *sta)
362{
363 debugfs_remove(key->debugfs.stalink);
364 key->debugfs.stalink = NULL;
365}
366
