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 case WLAN_CIPHER_SUITE_CCMP_256: 98 case WLAN_CIPHER_SUITE_AES_CMAC: 99 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 100 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 101 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 102 case WLAN_CIPHER_SUITE_GCMP: 103 case WLAN_CIPHER_SUITE_GCMP_256: 104 pn = atomic64_read(&key->conf.tx_pn); 105 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 106 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24), 107 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn); 108 break; 109 default: 110 return 0; 111 } 112 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 113 } 114 KEY_OPS(tx_spec); 115 116 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, 117 size_t count, loff_t *ppos) 118 { 119 struct ieee80211_key *key = file->private_data; 120 char buf[14*IEEE80211_NUM_TIDS+1], *p = buf; 121 int i, len; 122 const u8 *rpn; 123 124 switch (key->conf.cipher) { 125 case WLAN_CIPHER_SUITE_WEP40: 126 case WLAN_CIPHER_SUITE_WEP104: 127 len = scnprintf(buf, sizeof(buf), "\n"); 128 break; 129 case WLAN_CIPHER_SUITE_TKIP: 130 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 131 p += scnprintf(p, sizeof(buf)+buf-p, 132 "%08x %04x\n", 133 key->u.tkip.rx[i].iv32, 134 key->u.tkip.rx[i].iv16); 135 len = p - buf; 136 break; 137 case WLAN_CIPHER_SUITE_CCMP: 138 case WLAN_CIPHER_SUITE_CCMP_256: 139 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 140 rpn = key->u.ccmp.rx_pn[i]; 141 p += scnprintf(p, sizeof(buf)+buf-p, 142 "%02x%02x%02x%02x%02x%02x\n", 143 rpn[0], rpn[1], rpn[2], 144 rpn[3], rpn[4], rpn[5]); 145 } 146 len = p - buf; 147 break; 148 case WLAN_CIPHER_SUITE_AES_CMAC: 149 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 150 rpn = key->u.aes_cmac.rx_pn; 151 p += scnprintf(p, sizeof(buf)+buf-p, 152 "%02x%02x%02x%02x%02x%02x\n", 153 rpn[0], rpn[1], rpn[2], 154 rpn[3], rpn[4], rpn[5]); 155 len = p - buf; 156 break; 157 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 158 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 159 rpn = key->u.aes_gmac.rx_pn; 160 p += scnprintf(p, sizeof(buf)+buf-p, 161 "%02x%02x%02x%02x%02x%02x\n", 162 rpn[0], rpn[1], rpn[2], 163 rpn[3], rpn[4], rpn[5]); 164 len = p - buf; 165 break; 166 case WLAN_CIPHER_SUITE_GCMP: 167 case WLAN_CIPHER_SUITE_GCMP_256: 168 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 169 rpn = key->u.gcmp.rx_pn[i]; 170 p += scnprintf(p, sizeof(buf)+buf-p, 171 "%02x%02x%02x%02x%02x%02x\n", 172 rpn[0], rpn[1], rpn[2], 173 rpn[3], rpn[4], rpn[5]); 174 } 175 len = p - buf; 176 break; 177 default: 178 return 0; 179 } 180 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 181 } 182 KEY_OPS(rx_spec); 183 184 static ssize_t key_replays_read(struct file *file, char __user *userbuf, 185 size_t count, loff_t *ppos) 186 { 187 struct ieee80211_key *key = file->private_data; 188 char buf[20]; 189 int len; 190 191 switch (key->conf.cipher) { 192 case WLAN_CIPHER_SUITE_CCMP: 193 case WLAN_CIPHER_SUITE_CCMP_256: 194 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); 195 break; 196 case WLAN_CIPHER_SUITE_AES_CMAC: 197 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 198 len = scnprintf(buf, sizeof(buf), "%u\n", 199 key->u.aes_cmac.replays); 200 break; 201 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 202 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 203 len = scnprintf(buf, sizeof(buf), "%u\n", 204 key->u.aes_gmac.replays); 205 break; 206 case WLAN_CIPHER_SUITE_GCMP: 207 case WLAN_CIPHER_SUITE_GCMP_256: 208 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.replays); 209 break; 210 default: 211 return 0; 212 } 213 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 214 } 215 KEY_OPS(replays); 216 217 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, 218 size_t count, loff_t *ppos) 219 { 220 struct ieee80211_key *key = file->private_data; 221 char buf[20]; 222 int len; 223 224 switch (key->conf.cipher) { 225 case WLAN_CIPHER_SUITE_AES_CMAC: 226 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 227 len = scnprintf(buf, sizeof(buf), "%u\n", 228 key->u.aes_cmac.icverrors); 229 break; 230 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 231 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 232 len = scnprintf(buf, sizeof(buf), "%u\n", 233 key->u.aes_gmac.icverrors); 234 break; 235 default: 236 return 0; 237 } 238 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 239 } 240 KEY_OPS(icverrors); 241 242 static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf, 243 size_t count, loff_t *ppos) 244 { 245 struct ieee80211_key *key = file->private_data; 246 char buf[20]; 247 int len; 248 249 if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP) 250 return -EINVAL; 251 252 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures); 253 254 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 255 } 256 KEY_OPS(mic_failures); 257 258 static ssize_t key_key_read(struct file *file, char __user *userbuf, 259 size_t count, loff_t *ppos) 260 { 261 struct ieee80211_key *key = file->private_data; 262 int i, bufsize = 2 * key->conf.keylen + 2; 263 char *buf = kmalloc(bufsize, GFP_KERNEL); 264 char *p = buf; 265 ssize_t res; 266 267 if (!buf) 268 return -ENOMEM; 269 270 for (i = 0; i < key->conf.keylen; i++) 271 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); 272 p += scnprintf(p, bufsize+buf-p, "\n"); 273 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 274 kfree(buf); 275 return res; 276 } 277 KEY_OPS(key); 278 279 #define DEBUGFS_ADD(name) \ 280 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 281 key, &key_##name##_ops); 282 283 void ieee80211_debugfs_key_add(struct ieee80211_key *key) 284 { 285 static int keycount; 286 char buf[100]; 287 struct sta_info *sta; 288 289 if (!key->local->debugfs.keys) 290 return; 291 292 sprintf(buf, "%d", keycount); 293 key->debugfs.cnt = keycount; 294 keycount++; 295 key->debugfs.dir = debugfs_create_dir(buf, 296 key->local->debugfs.keys); 297 298 if (!key->debugfs.dir) 299 return; 300 301 sta = key->sta; 302 if (sta) { 303 sprintf(buf, "../../netdev:%s/stations/%pM", 304 sta->sdata->name, sta->sta.addr); 305 key->debugfs.stalink = 306 debugfs_create_symlink("station", key->debugfs.dir, buf); 307 } 308 309 DEBUGFS_ADD(keylen); 310 DEBUGFS_ADD(flags); 311 DEBUGFS_ADD(keyidx); 312 DEBUGFS_ADD(hw_key_idx); 313 DEBUGFS_ADD(tx_rx_count); 314 DEBUGFS_ADD(algorithm); 315 DEBUGFS_ADD(tx_spec); 316 DEBUGFS_ADD(rx_spec); 317 DEBUGFS_ADD(replays); 318 DEBUGFS_ADD(icverrors); 319 DEBUGFS_ADD(mic_failures); 320 DEBUGFS_ADD(key); 321 DEBUGFS_ADD(ifindex); 322 }; 323 324 void ieee80211_debugfs_key_remove(struct ieee80211_key *key) 325 { 326 if (!key) 327 return; 328 329 debugfs_remove_recursive(key->debugfs.dir); 330 key->debugfs.dir = NULL; 331 } 332 333 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata) 334 { 335 char buf[50]; 336 struct ieee80211_key *key; 337 338 if (!sdata->vif.debugfs_dir) 339 return; 340 341 lockdep_assert_held(&sdata->local->key_mtx); 342 343 debugfs_remove(sdata->debugfs.default_unicast_key); 344 sdata->debugfs.default_unicast_key = NULL; 345 346 if (sdata->default_unicast_key) { 347 key = key_mtx_dereference(sdata->local, 348 sdata->default_unicast_key); 349 sprintf(buf, "../keys/%d", key->debugfs.cnt); 350 sdata->debugfs.default_unicast_key = 351 debugfs_create_symlink("default_unicast_key", 352 sdata->vif.debugfs_dir, buf); 353 } 354 355 debugfs_remove(sdata->debugfs.default_multicast_key); 356 sdata->debugfs.default_multicast_key = NULL; 357 358 if (sdata->default_multicast_key) { 359 key = key_mtx_dereference(sdata->local, 360 sdata->default_multicast_key); 361 sprintf(buf, "../keys/%d", key->debugfs.cnt); 362 sdata->debugfs.default_multicast_key = 363 debugfs_create_symlink("default_multicast_key", 364 sdata->vif.debugfs_dir, buf); 365 } 366 } 367 368 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) 369 { 370 char buf[50]; 371 struct ieee80211_key *key; 372 373 if (!sdata->vif.debugfs_dir) 374 return; 375 376 key = key_mtx_dereference(sdata->local, 377 sdata->default_mgmt_key); 378 if (key) { 379 sprintf(buf, "../keys/%d", key->debugfs.cnt); 380 sdata->debugfs.default_mgmt_key = 381 debugfs_create_symlink("default_mgmt_key", 382 sdata->vif.debugfs_dir, buf); 383 } else 384 ieee80211_debugfs_key_remove_mgmt_default(sdata); 385 } 386 387 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) 388 { 389 if (!sdata) 390 return; 391 392 debugfs_remove(sdata->debugfs.default_mgmt_key); 393 sdata->debugfs.default_mgmt_key = NULL; 394 } 395 396 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 397 struct sta_info *sta) 398 { 399 debugfs_remove(key->debugfs.stalink); 400 key->debugfs.stalink = NULL; 401 } 402