/* * Copyright 2003-2005 Devicescape Software, Inc. * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kobject.h> #include <linux/slab.h> #include "ieee80211_i.h" #include "key.h" #include "debugfs.h" #include "debugfs_key.h" #define KEY_READ(name, prop, format_string) \ static ssize_t key_##name##_read(struct file *file, \ char __user *userbuf, \ size_t count, loff_t *ppos) \ { \ struct ieee80211_key *key = file->private_data; \ return mac80211_format_buffer(userbuf, count, ppos, \ format_string, key->prop); \ } #define KEY_READ_D(name) KEY_READ(name, name, "%d\n") #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n") #define KEY_OPS(name) \ static const struct file_operations key_ ##name## _ops = { \ .read = key_##name##_read, \ .open = mac80211_open_file_generic, \ .llseek = generic_file_llseek, \ } #define KEY_FILE(name, format) \ KEY_READ_##format(name) \ KEY_OPS(name) #define KEY_CONF_READ(name, format_string) \ KEY_READ(conf_##name, conf.name, format_string) #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n") #define KEY_CONF_OPS(name) \ static const struct file_operations key_ ##name## _ops = { \ .read = key_conf_##name##_read, \ .open = mac80211_open_file_generic, \ .llseek = generic_file_llseek, \ } #define KEY_CONF_FILE(name, format) \ KEY_CONF_READ_##format(name) \ KEY_CONF_OPS(name) KEY_CONF_FILE(keylen, D); KEY_CONF_FILE(keyidx, D); KEY_CONF_FILE(hw_key_idx, D); KEY_FILE(flags, X); KEY_FILE(tx_rx_count, D); KEY_READ(ifindex, sdata->name, "%s\n"); KEY_OPS(ifindex); static ssize_t key_algorithm_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { char buf[15]; struct ieee80211_key *key = file->private_data; u32 c = key->conf.cipher; sprintf(buf, "%.2x-%.2x-%.2x:%d\n", c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff); return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); } KEY_OPS(algorithm); static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { const u8 *tpn; char buf[20]; int len; struct ieee80211_key *key = file->private_data; switch (key->conf.cipher) { case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: len = scnprintf(buf, sizeof(buf), "\n"); break; case WLAN_CIPHER_SUITE_TKIP: len = scnprintf(buf, sizeof(buf), "%08x %04x\n", key->u.tkip.tx.iv32, key->u.tkip.tx.iv16); break; case WLAN_CIPHER_SUITE_CCMP: tpn = key->u.ccmp.tx_pn; len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); break; case WLAN_CIPHER_SUITE_AES_CMAC: tpn = key->u.aes_cmac.tx_pn; len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); break; default: return 0; } return simple_read_from_buffer(userbuf, count, ppos, buf, len); } KEY_OPS(tx_spec); static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct ieee80211_key *key = file->private_data; char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; int i, len; const u8 *rpn; switch (key->conf.cipher) { case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: len = scnprintf(buf, sizeof(buf), "\n"); break; case WLAN_CIPHER_SUITE_TKIP: for (i = 0; i < NUM_RX_DATA_QUEUES; i++) p += scnprintf(p, sizeof(buf)+buf-p, "%08x %04x\n", key->u.tkip.rx[i].iv32, key->u.tkip.rx[i].iv16); len = p - buf; break; case WLAN_CIPHER_SUITE_CCMP: for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) { rpn = key->u.ccmp.rx_pn[i]; p += scnprintf(p, sizeof(buf)+buf-p, "%02x%02x%02x%02x%02x%02x\n", rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5]); } len = p - buf; break; case WLAN_CIPHER_SUITE_AES_CMAC: rpn = key->u.aes_cmac.rx_pn; p += scnprintf(p, sizeof(buf)+buf-p, "%02x%02x%02x%02x%02x%02x\n", rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5]); len = p - buf; break; default: return 0; } return simple_read_from_buffer(userbuf, count, ppos, buf, len); } KEY_OPS(rx_spec); static ssize_t key_replays_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct ieee80211_key *key = file->private_data; char buf[20]; int len; switch (key->conf.cipher) { case WLAN_CIPHER_SUITE_CCMP: len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); break; case WLAN_CIPHER_SUITE_AES_CMAC: len = scnprintf(buf, sizeof(buf), "%u\n", key->u.aes_cmac.replays); break; default: return 0; } return simple_read_from_buffer(userbuf, count, ppos, buf, len); } KEY_OPS(replays); static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct ieee80211_key *key = file->private_data; char buf[20]; int len; switch (key->conf.cipher) { case WLAN_CIPHER_SUITE_AES_CMAC: len = scnprintf(buf, sizeof(buf), "%u\n", key->u.aes_cmac.icverrors); break; default: return 0; } return simple_read_from_buffer(userbuf, count, ppos, buf, len); } KEY_OPS(icverrors); static ssize_t key_key_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct ieee80211_key *key = file->private_data; int i, bufsize = 2 * key->conf.keylen + 2; char *buf = kmalloc(bufsize, GFP_KERNEL); char *p = buf; ssize_t res; if (!buf) return -ENOMEM; for (i = 0; i < key->conf.keylen; i++) p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); p += scnprintf(p, bufsize+buf-p, "\n"); res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); kfree(buf); return res; } KEY_OPS(key); #define DEBUGFS_ADD(name) \ debugfs_create_file(#name, 0400, key->debugfs.dir, \ key, &key_##name##_ops); void ieee80211_debugfs_key_add(struct ieee80211_key *key) { static int keycount; char buf[50]; struct sta_info *sta; if (!key->local->debugfs.keys) return; sprintf(buf, "%d", keycount); key->debugfs.cnt = keycount; keycount++; key->debugfs.dir = debugfs_create_dir(buf, key->local->debugfs.keys); if (!key->debugfs.dir) return; rcu_read_lock(); sta = rcu_dereference(key->sta); if (sta) sprintf(buf, "../../stations/%pM", sta->sta.addr); rcu_read_unlock(); /* using sta as a boolean is fine outside RCU lock */ if (sta) key->debugfs.stalink = debugfs_create_symlink("station", key->debugfs.dir, buf); DEBUGFS_ADD(keylen); DEBUGFS_ADD(flags); DEBUGFS_ADD(keyidx); DEBUGFS_ADD(hw_key_idx); DEBUGFS_ADD(tx_rx_count); DEBUGFS_ADD(algorithm); DEBUGFS_ADD(tx_spec); DEBUGFS_ADD(rx_spec); DEBUGFS_ADD(replays); DEBUGFS_ADD(icverrors); DEBUGFS_ADD(key); DEBUGFS_ADD(ifindex); }; void ieee80211_debugfs_key_remove(struct ieee80211_key *key) { if (!key) return; debugfs_remove_recursive(key->debugfs.dir); key->debugfs.dir = NULL; } void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata) { char buf[50]; struct ieee80211_key *key; if (!sdata->debugfs.dir) return; lockdep_assert_held(&sdata->local->key_mtx); if (sdata->default_unicast_key) { key = sdata->default_unicast_key; sprintf(buf, "../keys/%d", key->debugfs.cnt); sdata->debugfs.default_unicast_key = debugfs_create_symlink("default_unicast_key", sdata->debugfs.dir, buf); } else { debugfs_remove(sdata->debugfs.default_unicast_key); sdata->debugfs.default_unicast_key = NULL; } if (sdata->default_multicast_key) { key = sdata->default_multicast_key; sprintf(buf, "../keys/%d", key->debugfs.cnt); sdata->debugfs.default_multicast_key = debugfs_create_symlink("default_multicast_key", sdata->debugfs.dir, buf); } else { debugfs_remove(sdata->debugfs.default_multicast_key); sdata->debugfs.default_multicast_key = NULL; } } void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) { char buf[50]; struct ieee80211_key *key; if (!sdata->debugfs.dir) return; /* this is running under the key lock */ key = sdata->default_mgmt_key; if (key) { sprintf(buf, "../keys/%d", key->debugfs.cnt); sdata->debugfs.default_mgmt_key = debugfs_create_symlink("default_mgmt_key", sdata->debugfs.dir, buf); } else ieee80211_debugfs_key_remove_mgmt_default(sdata); } void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) { if (!sdata) return; debugfs_remove(sdata->debugfs.default_mgmt_key); sdata->debugfs.default_mgmt_key = NULL; } void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, struct sta_info *sta) { debugfs_remove(key->debugfs.stalink); key->debugfs.stalink = NULL; }