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 = mac80211_open_file_generic, \ 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 = mac80211_open_file_generic, \ 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 const u8 *tpn; 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 tpn = key->u.ccmp.tx_pn; 98 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 99 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); 100 break; 101 case WLAN_CIPHER_SUITE_AES_CMAC: 102 tpn = key->u.aes_cmac.tx_pn; 103 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 104 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], 105 tpn[5]); 106 break; 107 default: 108 return 0; 109 } 110 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 111 } 112 KEY_OPS(tx_spec); 113 114 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, 115 size_t count, loff_t *ppos) 116 { 117 struct ieee80211_key *key = file->private_data; 118 char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; 119 int i, len; 120 const u8 *rpn; 121 122 switch (key->conf.cipher) { 123 case WLAN_CIPHER_SUITE_WEP40: 124 case WLAN_CIPHER_SUITE_WEP104: 125 len = scnprintf(buf, sizeof(buf), "\n"); 126 break; 127 case WLAN_CIPHER_SUITE_TKIP: 128 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 129 p += scnprintf(p, sizeof(buf)+buf-p, 130 "%08x %04x\n", 131 key->u.tkip.rx[i].iv32, 132 key->u.tkip.rx[i].iv16); 133 len = p - buf; 134 break; 135 case WLAN_CIPHER_SUITE_CCMP: 136 for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) { 137 rpn = key->u.ccmp.rx_pn[i]; 138 p += scnprintf(p, sizeof(buf)+buf-p, 139 "%02x%02x%02x%02x%02x%02x\n", 140 rpn[0], rpn[1], rpn[2], 141 rpn[3], rpn[4], rpn[5]); 142 } 143 len = p - buf; 144 break; 145 case WLAN_CIPHER_SUITE_AES_CMAC: 146 rpn = key->u.aes_cmac.rx_pn; 147 p += scnprintf(p, sizeof(buf)+buf-p, 148 "%02x%02x%02x%02x%02x%02x\n", 149 rpn[0], rpn[1], rpn[2], 150 rpn[3], rpn[4], rpn[5]); 151 len = p - buf; 152 break; 153 default: 154 return 0; 155 } 156 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 157 } 158 KEY_OPS(rx_spec); 159 160 static ssize_t key_replays_read(struct file *file, char __user *userbuf, 161 size_t count, loff_t *ppos) 162 { 163 struct ieee80211_key *key = file->private_data; 164 char buf[20]; 165 int len; 166 167 switch (key->conf.cipher) { 168 case WLAN_CIPHER_SUITE_CCMP: 169 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); 170 break; 171 case WLAN_CIPHER_SUITE_AES_CMAC: 172 len = scnprintf(buf, sizeof(buf), "%u\n", 173 key->u.aes_cmac.replays); 174 break; 175 default: 176 return 0; 177 } 178 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 179 } 180 KEY_OPS(replays); 181 182 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, 183 size_t count, loff_t *ppos) 184 { 185 struct ieee80211_key *key = file->private_data; 186 char buf[20]; 187 int len; 188 189 switch (key->conf.cipher) { 190 case WLAN_CIPHER_SUITE_AES_CMAC: 191 len = scnprintf(buf, sizeof(buf), "%u\n", 192 key->u.aes_cmac.icverrors); 193 break; 194 default: 195 return 0; 196 } 197 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 198 } 199 KEY_OPS(icverrors); 200 201 static ssize_t key_key_read(struct file *file, char __user *userbuf, 202 size_t count, loff_t *ppos) 203 { 204 struct ieee80211_key *key = file->private_data; 205 int i, bufsize = 2 * key->conf.keylen + 2; 206 char *buf = kmalloc(bufsize, GFP_KERNEL); 207 char *p = buf; 208 ssize_t res; 209 210 if (!buf) 211 return -ENOMEM; 212 213 for (i = 0; i < key->conf.keylen; i++) 214 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); 215 p += scnprintf(p, bufsize+buf-p, "\n"); 216 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 217 kfree(buf); 218 return res; 219 } 220 KEY_OPS(key); 221 222 #define DEBUGFS_ADD(name) \ 223 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 224 key, &key_##name##_ops); 225 226 void ieee80211_debugfs_key_add(struct ieee80211_key *key) 227 { 228 static int keycount; 229 char buf[50]; 230 struct sta_info *sta; 231 232 if (!key->local->debugfs.keys) 233 return; 234 235 sprintf(buf, "%d", keycount); 236 key->debugfs.cnt = keycount; 237 keycount++; 238 key->debugfs.dir = debugfs_create_dir(buf, 239 key->local->debugfs.keys); 240 241 if (!key->debugfs.dir) 242 return; 243 244 sta = key->sta; 245 if (sta) { 246 sprintf(buf, "../../stations/%pM", sta->sta.addr); 247 key->debugfs.stalink = 248 debugfs_create_symlink("station", key->debugfs.dir, buf); 249 } 250 251 DEBUGFS_ADD(keylen); 252 DEBUGFS_ADD(flags); 253 DEBUGFS_ADD(keyidx); 254 DEBUGFS_ADD(hw_key_idx); 255 DEBUGFS_ADD(tx_rx_count); 256 DEBUGFS_ADD(algorithm); 257 DEBUGFS_ADD(tx_spec); 258 DEBUGFS_ADD(rx_spec); 259 DEBUGFS_ADD(replays); 260 DEBUGFS_ADD(icverrors); 261 DEBUGFS_ADD(key); 262 DEBUGFS_ADD(ifindex); 263 }; 264 265 void ieee80211_debugfs_key_remove(struct ieee80211_key *key) 266 { 267 if (!key) 268 return; 269 270 debugfs_remove_recursive(key->debugfs.dir); 271 key->debugfs.dir = NULL; 272 } 273 274 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata) 275 { 276 char buf[50]; 277 struct ieee80211_key *key; 278 279 if (!sdata->debugfs.dir) 280 return; 281 282 lockdep_assert_held(&sdata->local->key_mtx); 283 284 if (sdata->default_unicast_key) { 285 key = key_mtx_dereference(sdata->local, 286 sdata->default_unicast_key); 287 sprintf(buf, "../keys/%d", key->debugfs.cnt); 288 sdata->debugfs.default_unicast_key = 289 debugfs_create_symlink("default_unicast_key", 290 sdata->debugfs.dir, buf); 291 } else { 292 debugfs_remove(sdata->debugfs.default_unicast_key); 293 sdata->debugfs.default_unicast_key = NULL; 294 } 295 296 if (sdata->default_multicast_key) { 297 key = key_mtx_dereference(sdata->local, 298 sdata->default_multicast_key); 299 sprintf(buf, "../keys/%d", key->debugfs.cnt); 300 sdata->debugfs.default_multicast_key = 301 debugfs_create_symlink("default_multicast_key", 302 sdata->debugfs.dir, buf); 303 } else { 304 debugfs_remove(sdata->debugfs.default_multicast_key); 305 sdata->debugfs.default_multicast_key = NULL; 306 } 307 } 308 309 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) 310 { 311 char buf[50]; 312 struct ieee80211_key *key; 313 314 if (!sdata->debugfs.dir) 315 return; 316 317 key = key_mtx_dereference(sdata->local, 318 sdata->default_mgmt_key); 319 if (key) { 320 sprintf(buf, "../keys/%d", key->debugfs.cnt); 321 sdata->debugfs.default_mgmt_key = 322 debugfs_create_symlink("default_mgmt_key", 323 sdata->debugfs.dir, buf); 324 } else 325 ieee80211_debugfs_key_remove_mgmt_default(sdata); 326 } 327 328 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) 329 { 330 if (!sdata) 331 return; 332 333 debugfs_remove(sdata->debugfs.default_mgmt_key); 334 sdata->debugfs.default_mgmt_key = NULL; 335 } 336 337 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 338 struct sta_info *sta) 339 { 340 debugfs_remove(key->debugfs.stalink); 341 key->debugfs.stalink = NULL; 342 } 343