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) \ 19 static 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) \ 31 static 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) \ 46 static 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 56 KEY_CONF_FILE(keylen, D); 57 KEY_CONF_FILE(keyidx, D); 58 KEY_CONF_FILE(hw_key_idx, D); 59 KEY_FILE(flags, X); 60 KEY_FILE(tx_rx_count, D); 61 KEY_READ(ifindex, sdata->name, "%s\n"); 62 KEY_OPS(ifindex); 63 64 static 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 } 76 KEY_OPS(algorithm); 77 78 static 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 } 113 KEY_OPS(tx_spec); 114 115 static 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 } 159 KEY_OPS(rx_spec); 160 161 static 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 } 181 KEY_OPS(replays); 182 183 static 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 } 200 KEY_OPS(icverrors); 201 202 static 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 } 216 KEY_OPS(mic_failures); 217 218 static 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 } 237 KEY_OPS(key); 238 239 #define DEBUGFS_ADD(name) \ 240 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 241 key, &key_##name##_ops); 242 243 void 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 }; 283 284 void 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 } 292 293 void 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 } 331 332 void 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 } 350 351 void 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 } 359 360 void 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