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 pn = atomic64_read(&key->u.ccmp.tx_pn); 99 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 100 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24), 101 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn); 102 break; 103 case WLAN_CIPHER_SUITE_AES_CMAC: 104 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 105 pn = atomic64_read(&key->u.aes_cmac.tx_pn); 106 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 107 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24), 108 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn); 109 break; 110 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 111 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 112 pn = atomic64_read(&key->u.aes_gmac.tx_pn); 113 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 114 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24), 115 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn); 116 break; 117 case WLAN_CIPHER_SUITE_GCMP: 118 case WLAN_CIPHER_SUITE_GCMP_256: 119 pn = atomic64_read(&key->u.gcmp.tx_pn); 120 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 121 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24), 122 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn); 123 break; 124 default: 125 return 0; 126 } 127 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 128 } 129 KEY_OPS(tx_spec); 130 131 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, 132 size_t count, loff_t *ppos) 133 { 134 struct ieee80211_key *key = file->private_data; 135 char buf[14*IEEE80211_NUM_TIDS+1], *p = buf; 136 int i, len; 137 const u8 *rpn; 138 139 switch (key->conf.cipher) { 140 case WLAN_CIPHER_SUITE_WEP40: 141 case WLAN_CIPHER_SUITE_WEP104: 142 len = scnprintf(buf, sizeof(buf), "\n"); 143 break; 144 case WLAN_CIPHER_SUITE_TKIP: 145 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 146 p += scnprintf(p, sizeof(buf)+buf-p, 147 "%08x %04x\n", 148 key->u.tkip.rx[i].iv32, 149 key->u.tkip.rx[i].iv16); 150 len = p - buf; 151 break; 152 case WLAN_CIPHER_SUITE_CCMP: 153 case WLAN_CIPHER_SUITE_CCMP_256: 154 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 155 rpn = key->u.ccmp.rx_pn[i]; 156 p += scnprintf(p, sizeof(buf)+buf-p, 157 "%02x%02x%02x%02x%02x%02x\n", 158 rpn[0], rpn[1], rpn[2], 159 rpn[3], rpn[4], rpn[5]); 160 } 161 len = p - buf; 162 break; 163 case WLAN_CIPHER_SUITE_AES_CMAC: 164 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 165 rpn = key->u.aes_cmac.rx_pn; 166 p += scnprintf(p, sizeof(buf)+buf-p, 167 "%02x%02x%02x%02x%02x%02x\n", 168 rpn[0], rpn[1], rpn[2], 169 rpn[3], rpn[4], rpn[5]); 170 len = p - buf; 171 break; 172 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 173 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 174 rpn = key->u.aes_gmac.rx_pn; 175 p += scnprintf(p, sizeof(buf)+buf-p, 176 "%02x%02x%02x%02x%02x%02x\n", 177 rpn[0], rpn[1], rpn[2], 178 rpn[3], rpn[4], rpn[5]); 179 len = p - buf; 180 break; 181 case WLAN_CIPHER_SUITE_GCMP: 182 case WLAN_CIPHER_SUITE_GCMP_256: 183 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 184 rpn = key->u.gcmp.rx_pn[i]; 185 p += scnprintf(p, sizeof(buf)+buf-p, 186 "%02x%02x%02x%02x%02x%02x\n", 187 rpn[0], rpn[1], rpn[2], 188 rpn[3], rpn[4], rpn[5]); 189 } 190 len = p - buf; 191 break; 192 default: 193 return 0; 194 } 195 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 196 } 197 KEY_OPS(rx_spec); 198 199 static ssize_t key_replays_read(struct file *file, char __user *userbuf, 200 size_t count, loff_t *ppos) 201 { 202 struct ieee80211_key *key = file->private_data; 203 char buf[20]; 204 int len; 205 206 switch (key->conf.cipher) { 207 case WLAN_CIPHER_SUITE_CCMP: 208 case WLAN_CIPHER_SUITE_CCMP_256: 209 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); 210 break; 211 case WLAN_CIPHER_SUITE_AES_CMAC: 212 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 213 len = scnprintf(buf, sizeof(buf), "%u\n", 214 key->u.aes_cmac.replays); 215 break; 216 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 217 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 218 len = scnprintf(buf, sizeof(buf), "%u\n", 219 key->u.aes_gmac.replays); 220 break; 221 case WLAN_CIPHER_SUITE_GCMP: 222 case WLAN_CIPHER_SUITE_GCMP_256: 223 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.replays); 224 break; 225 default: 226 return 0; 227 } 228 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 229 } 230 KEY_OPS(replays); 231 232 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, 233 size_t count, loff_t *ppos) 234 { 235 struct ieee80211_key *key = file->private_data; 236 char buf[20]; 237 int len; 238 239 switch (key->conf.cipher) { 240 case WLAN_CIPHER_SUITE_AES_CMAC: 241 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 242 len = scnprintf(buf, sizeof(buf), "%u\n", 243 key->u.aes_cmac.icverrors); 244 break; 245 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 246 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 247 len = scnprintf(buf, sizeof(buf), "%u\n", 248 key->u.aes_gmac.icverrors); 249 break; 250 default: 251 return 0; 252 } 253 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 254 } 255 KEY_OPS(icverrors); 256 257 static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf, 258 size_t count, loff_t *ppos) 259 { 260 struct ieee80211_key *key = file->private_data; 261 char buf[20]; 262 int len; 263 264 if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP) 265 return -EINVAL; 266 267 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures); 268 269 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 270 } 271 KEY_OPS(mic_failures); 272 273 static ssize_t key_key_read(struct file *file, char __user *userbuf, 274 size_t count, loff_t *ppos) 275 { 276 struct ieee80211_key *key = file->private_data; 277 int i, bufsize = 2 * key->conf.keylen + 2; 278 char *buf = kmalloc(bufsize, GFP_KERNEL); 279 char *p = buf; 280 ssize_t res; 281 282 if (!buf) 283 return -ENOMEM; 284 285 for (i = 0; i < key->conf.keylen; i++) 286 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); 287 p += scnprintf(p, bufsize+buf-p, "\n"); 288 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 289 kfree(buf); 290 return res; 291 } 292 KEY_OPS(key); 293 294 #define DEBUGFS_ADD(name) \ 295 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 296 key, &key_##name##_ops); 297 298 void ieee80211_debugfs_key_add(struct ieee80211_key *key) 299 { 300 static int keycount; 301 char buf[100]; 302 struct sta_info *sta; 303 304 if (!key->local->debugfs.keys) 305 return; 306 307 sprintf(buf, "%d", keycount); 308 key->debugfs.cnt = keycount; 309 keycount++; 310 key->debugfs.dir = debugfs_create_dir(buf, 311 key->local->debugfs.keys); 312 313 if (!key->debugfs.dir) 314 return; 315 316 sta = key->sta; 317 if (sta) { 318 sprintf(buf, "../../netdev:%s/stations/%pM", 319 sta->sdata->name, sta->sta.addr); 320 key->debugfs.stalink = 321 debugfs_create_symlink("station", key->debugfs.dir, buf); 322 } 323 324 DEBUGFS_ADD(keylen); 325 DEBUGFS_ADD(flags); 326 DEBUGFS_ADD(keyidx); 327 DEBUGFS_ADD(hw_key_idx); 328 DEBUGFS_ADD(tx_rx_count); 329 DEBUGFS_ADD(algorithm); 330 DEBUGFS_ADD(tx_spec); 331 DEBUGFS_ADD(rx_spec); 332 DEBUGFS_ADD(replays); 333 DEBUGFS_ADD(icverrors); 334 DEBUGFS_ADD(mic_failures); 335 DEBUGFS_ADD(key); 336 DEBUGFS_ADD(ifindex); 337 }; 338 339 void ieee80211_debugfs_key_remove(struct ieee80211_key *key) 340 { 341 if (!key) 342 return; 343 344 debugfs_remove_recursive(key->debugfs.dir); 345 key->debugfs.dir = NULL; 346 } 347 348 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata) 349 { 350 char buf[50]; 351 struct ieee80211_key *key; 352 353 if (!sdata->vif.debugfs_dir) 354 return; 355 356 lockdep_assert_held(&sdata->local->key_mtx); 357 358 debugfs_remove(sdata->debugfs.default_unicast_key); 359 sdata->debugfs.default_unicast_key = NULL; 360 361 if (sdata->default_unicast_key) { 362 key = key_mtx_dereference(sdata->local, 363 sdata->default_unicast_key); 364 sprintf(buf, "../keys/%d", key->debugfs.cnt); 365 sdata->debugfs.default_unicast_key = 366 debugfs_create_symlink("default_unicast_key", 367 sdata->vif.debugfs_dir, buf); 368 } 369 370 debugfs_remove(sdata->debugfs.default_multicast_key); 371 sdata->debugfs.default_multicast_key = NULL; 372 373 if (sdata->default_multicast_key) { 374 key = key_mtx_dereference(sdata->local, 375 sdata->default_multicast_key); 376 sprintf(buf, "../keys/%d", key->debugfs.cnt); 377 sdata->debugfs.default_multicast_key = 378 debugfs_create_symlink("default_multicast_key", 379 sdata->vif.debugfs_dir, buf); 380 } 381 } 382 383 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) 384 { 385 char buf[50]; 386 struct ieee80211_key *key; 387 388 if (!sdata->vif.debugfs_dir) 389 return; 390 391 key = key_mtx_dereference(sdata->local, 392 sdata->default_mgmt_key); 393 if (key) { 394 sprintf(buf, "../keys/%d", key->debugfs.cnt); 395 sdata->debugfs.default_mgmt_key = 396 debugfs_create_symlink("default_mgmt_key", 397 sdata->vif.debugfs_dir, buf); 398 } else 399 ieee80211_debugfs_key_remove_mgmt_default(sdata); 400 } 401 402 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) 403 { 404 if (!sdata) 405 return; 406 407 debugfs_remove(sdata->debugfs.default_mgmt_key); 408 sdata->debugfs.default_mgmt_key = NULL; 409 } 410 411 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 412 struct sta_info *sta) 413 { 414 debugfs_remove(key->debugfs.stalink); 415 key->debugfs.stalink = NULL; 416 } 417