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_key_read(struct file *file, char __user *userbuf, 203 size_t count, loff_t *ppos) 204 { 205 struct ieee80211_key *key = file->private_data; 206 int i, bufsize = 2 * key->conf.keylen + 2; 207 char *buf = kmalloc(bufsize, GFP_KERNEL); 208 char *p = buf; 209 ssize_t res; 210 211 if (!buf) 212 return -ENOMEM; 213 214 for (i = 0; i < key->conf.keylen; i++) 215 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); 216 p += scnprintf(p, bufsize+buf-p, "\n"); 217 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 218 kfree(buf); 219 return res; 220 } 221 KEY_OPS(key); 222 223 #define DEBUGFS_ADD(name) \ 224 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 225 key, &key_##name##_ops); 226 227 void ieee80211_debugfs_key_add(struct ieee80211_key *key) 228 { 229 static int keycount; 230 char buf[100]; 231 struct sta_info *sta; 232 233 if (!key->local->debugfs.keys) 234 return; 235 236 sprintf(buf, "%d", keycount); 237 key->debugfs.cnt = keycount; 238 keycount++; 239 key->debugfs.dir = debugfs_create_dir(buf, 240 key->local->debugfs.keys); 241 242 if (!key->debugfs.dir) 243 return; 244 245 sta = key->sta; 246 if (sta) { 247 sprintf(buf, "../../netdev:%s/stations/%pM", 248 sta->sdata->name, sta->sta.addr); 249 key->debugfs.stalink = 250 debugfs_create_symlink("station", key->debugfs.dir, buf); 251 } 252 253 DEBUGFS_ADD(keylen); 254 DEBUGFS_ADD(flags); 255 DEBUGFS_ADD(keyidx); 256 DEBUGFS_ADD(hw_key_idx); 257 DEBUGFS_ADD(tx_rx_count); 258 DEBUGFS_ADD(algorithm); 259 DEBUGFS_ADD(tx_spec); 260 DEBUGFS_ADD(rx_spec); 261 DEBUGFS_ADD(replays); 262 DEBUGFS_ADD(icverrors); 263 DEBUGFS_ADD(key); 264 DEBUGFS_ADD(ifindex); 265 }; 266 267 void ieee80211_debugfs_key_remove(struct ieee80211_key *key) 268 { 269 if (!key) 270 return; 271 272 debugfs_remove_recursive(key->debugfs.dir); 273 key->debugfs.dir = NULL; 274 } 275 276 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata) 277 { 278 char buf[50]; 279 struct ieee80211_key *key; 280 281 if (!sdata->debugfs.dir) 282 return; 283 284 lockdep_assert_held(&sdata->local->key_mtx); 285 286 if (sdata->debugfs.default_unicast_key) { 287 debugfs_remove(sdata->debugfs.default_unicast_key); 288 sdata->debugfs.default_unicast_key = NULL; 289 } 290 291 if (sdata->default_unicast_key) { 292 key = key_mtx_dereference(sdata->local, 293 sdata->default_unicast_key); 294 sprintf(buf, "../keys/%d", key->debugfs.cnt); 295 sdata->debugfs.default_unicast_key = 296 debugfs_create_symlink("default_unicast_key", 297 sdata->debugfs.dir, buf); 298 } 299 300 if (sdata->debugfs.default_multicast_key) { 301 debugfs_remove(sdata->debugfs.default_multicast_key); 302 sdata->debugfs.default_multicast_key = NULL; 303 } 304 305 if (sdata->default_multicast_key) { 306 key = key_mtx_dereference(sdata->local, 307 sdata->default_multicast_key); 308 sprintf(buf, "../keys/%d", key->debugfs.cnt); 309 sdata->debugfs.default_multicast_key = 310 debugfs_create_symlink("default_multicast_key", 311 sdata->debugfs.dir, buf); 312 } 313 } 314 315 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) 316 { 317 char buf[50]; 318 struct ieee80211_key *key; 319 320 if (!sdata->debugfs.dir) 321 return; 322 323 key = key_mtx_dereference(sdata->local, 324 sdata->default_mgmt_key); 325 if (key) { 326 sprintf(buf, "../keys/%d", key->debugfs.cnt); 327 sdata->debugfs.default_mgmt_key = 328 debugfs_create_symlink("default_mgmt_key", 329 sdata->debugfs.dir, buf); 330 } else 331 ieee80211_debugfs_key_remove_mgmt_default(sdata); 332 } 333 334 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) 335 { 336 if (!sdata) 337 return; 338 339 debugfs_remove(sdata->debugfs.default_mgmt_key); 340 sdata->debugfs.default_mgmt_key = NULL; 341 } 342 343 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 344 struct sta_info *sta) 345 { 346 debugfs_remove(key->debugfs.stalink); 347 key->debugfs.stalink = NULL; 348 } 349