473 lines
12 KiB
C
473 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2003-2005 Devicescape Software, Inc.
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* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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* Copyright (C) 2015 Intel Deutschland GmbH
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* Copyright (C) 2021-2022 Intel Corporation
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*/
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#include <linux/kobject.h>
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#include <linux/slab.h>
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#include "ieee80211_i.h"
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#include "key.h"
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#include "debugfs.h"
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#include "debugfs_key.h"
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#define KEY_READ(name, prop, format_string) \
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static ssize_t key_##name##_read(struct file *file, \
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char __user *userbuf, \
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size_t count, loff_t *ppos) \
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{ \
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struct ieee80211_key *key = file->private_data; \
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return mac80211_format_buffer(userbuf, count, ppos, \
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format_string, key->prop); \
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}
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#define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
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#define KEY_OPS(name) \
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static const struct file_operations key_ ##name## _ops = { \
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.read = key_##name##_read, \
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.open = simple_open, \
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.llseek = generic_file_llseek, \
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}
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#define KEY_OPS_W(name) \
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static const struct file_operations key_ ##name## _ops = { \
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.read = key_##name##_read, \
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.write = key_##name##_write, \
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.open = simple_open, \
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.llseek = generic_file_llseek, \
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}
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#define KEY_FILE(name, format) \
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KEY_READ_##format(name) \
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KEY_OPS(name)
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#define KEY_CONF_READ(name, format_string) \
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KEY_READ(conf_##name, conf.name, format_string)
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#define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n")
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#define KEY_CONF_OPS(name) \
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static const struct file_operations key_ ##name## _ops = { \
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.read = key_conf_##name##_read, \
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.open = simple_open, \
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.llseek = generic_file_llseek, \
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}
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#define KEY_CONF_FILE(name, format) \
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KEY_CONF_READ_##format(name) \
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KEY_CONF_OPS(name)
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KEY_CONF_FILE(keylen, D);
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KEY_CONF_FILE(keyidx, D);
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KEY_CONF_FILE(hw_key_idx, D);
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KEY_FILE(flags, X);
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KEY_READ(ifindex, sdata->name, "%s\n");
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KEY_OPS(ifindex);
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static ssize_t key_algorithm_read(struct file *file,
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char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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char buf[15];
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struct ieee80211_key *key = file->private_data;
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u32 c = key->conf.cipher;
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sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
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c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
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return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
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}
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KEY_OPS(algorithm);
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static ssize_t key_tx_spec_write(struct file *file, const char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_key *key = file->private_data;
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u64 pn;
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int ret;
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switch (key->conf.cipher) {
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case WLAN_CIPHER_SUITE_WEP40:
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case WLAN_CIPHER_SUITE_WEP104:
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return -EINVAL;
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case WLAN_CIPHER_SUITE_TKIP:
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/* not supported yet */
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return -EOPNOTSUPP;
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case WLAN_CIPHER_SUITE_CCMP:
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case WLAN_CIPHER_SUITE_CCMP_256:
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case WLAN_CIPHER_SUITE_AES_CMAC:
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case WLAN_CIPHER_SUITE_BIP_CMAC_256:
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case WLAN_CIPHER_SUITE_BIP_GMAC_128:
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case WLAN_CIPHER_SUITE_BIP_GMAC_256:
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case WLAN_CIPHER_SUITE_GCMP:
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case WLAN_CIPHER_SUITE_GCMP_256:
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ret = kstrtou64_from_user(userbuf, count, 16, &pn);
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if (ret)
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return ret;
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/* PN is a 48-bit counter */
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if (pn >= (1ULL << 48))
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return -ERANGE;
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atomic64_set(&key->conf.tx_pn, pn);
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return count;
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default:
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return 0;
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}
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}
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static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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u64 pn;
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char buf[20];
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int len;
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struct ieee80211_key *key = file->private_data;
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switch (key->conf.cipher) {
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case WLAN_CIPHER_SUITE_WEP40:
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case WLAN_CIPHER_SUITE_WEP104:
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len = scnprintf(buf, sizeof(buf), "\n");
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break;
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case WLAN_CIPHER_SUITE_TKIP:
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pn = atomic64_read(&key->conf.tx_pn);
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len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
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TKIP_PN_TO_IV32(pn),
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TKIP_PN_TO_IV16(pn));
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break;
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case WLAN_CIPHER_SUITE_CCMP:
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case WLAN_CIPHER_SUITE_CCMP_256:
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case WLAN_CIPHER_SUITE_AES_CMAC:
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case WLAN_CIPHER_SUITE_BIP_CMAC_256:
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case WLAN_CIPHER_SUITE_BIP_GMAC_128:
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case WLAN_CIPHER_SUITE_BIP_GMAC_256:
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case WLAN_CIPHER_SUITE_GCMP:
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case WLAN_CIPHER_SUITE_GCMP_256:
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pn = atomic64_read(&key->conf.tx_pn);
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len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
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(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
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(u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
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break;
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default:
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return 0;
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}
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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}
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KEY_OPS_W(tx_spec);
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static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_key *key = file->private_data;
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char buf[14*IEEE80211_NUM_TIDS+1], *p = buf;
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int i, len;
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const u8 *rpn;
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switch (key->conf.cipher) {
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case WLAN_CIPHER_SUITE_WEP40:
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case WLAN_CIPHER_SUITE_WEP104:
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len = scnprintf(buf, sizeof(buf), "\n");
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break;
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case WLAN_CIPHER_SUITE_TKIP:
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for (i = 0; i < IEEE80211_NUM_TIDS; i++)
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p += scnprintf(p, sizeof(buf)+buf-p,
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"%08x %04x\n",
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key->u.tkip.rx[i].iv32,
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key->u.tkip.rx[i].iv16);
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len = p - buf;
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break;
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case WLAN_CIPHER_SUITE_CCMP:
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case WLAN_CIPHER_SUITE_CCMP_256:
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for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
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rpn = key->u.ccmp.rx_pn[i];
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p += scnprintf(p, sizeof(buf)+buf-p,
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"%02x%02x%02x%02x%02x%02x\n",
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rpn[0], rpn[1], rpn[2],
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rpn[3], rpn[4], rpn[5]);
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}
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len = p - buf;
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break;
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case WLAN_CIPHER_SUITE_AES_CMAC:
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case WLAN_CIPHER_SUITE_BIP_CMAC_256:
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rpn = key->u.aes_cmac.rx_pn;
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p += scnprintf(p, sizeof(buf)+buf-p,
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"%02x%02x%02x%02x%02x%02x\n",
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rpn[0], rpn[1], rpn[2],
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rpn[3], rpn[4], rpn[5]);
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len = p - buf;
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break;
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case WLAN_CIPHER_SUITE_BIP_GMAC_128:
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case WLAN_CIPHER_SUITE_BIP_GMAC_256:
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rpn = key->u.aes_gmac.rx_pn;
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p += scnprintf(p, sizeof(buf)+buf-p,
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"%02x%02x%02x%02x%02x%02x\n",
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rpn[0], rpn[1], rpn[2],
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rpn[3], rpn[4], rpn[5]);
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len = p - buf;
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break;
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case WLAN_CIPHER_SUITE_GCMP:
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case WLAN_CIPHER_SUITE_GCMP_256:
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for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
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rpn = key->u.gcmp.rx_pn[i];
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p += scnprintf(p, sizeof(buf)+buf-p,
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"%02x%02x%02x%02x%02x%02x\n",
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rpn[0], rpn[1], rpn[2],
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rpn[3], rpn[4], rpn[5]);
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}
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len = p - buf;
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break;
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default:
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return 0;
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}
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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}
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KEY_OPS(rx_spec);
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static ssize_t key_replays_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_key *key = file->private_data;
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char buf[20];
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int len;
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switch (key->conf.cipher) {
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case WLAN_CIPHER_SUITE_CCMP:
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case WLAN_CIPHER_SUITE_CCMP_256:
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len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
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break;
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case WLAN_CIPHER_SUITE_AES_CMAC:
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case WLAN_CIPHER_SUITE_BIP_CMAC_256:
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len = scnprintf(buf, sizeof(buf), "%u\n",
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key->u.aes_cmac.replays);
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break;
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case WLAN_CIPHER_SUITE_BIP_GMAC_128:
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case WLAN_CIPHER_SUITE_BIP_GMAC_256:
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len = scnprintf(buf, sizeof(buf), "%u\n",
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key->u.aes_gmac.replays);
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break;
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case WLAN_CIPHER_SUITE_GCMP:
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case WLAN_CIPHER_SUITE_GCMP_256:
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len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.replays);
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break;
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default:
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return 0;
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}
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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}
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KEY_OPS(replays);
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static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_key *key = file->private_data;
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char buf[20];
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int len;
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switch (key->conf.cipher) {
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case WLAN_CIPHER_SUITE_AES_CMAC:
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case WLAN_CIPHER_SUITE_BIP_CMAC_256:
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len = scnprintf(buf, sizeof(buf), "%u\n",
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key->u.aes_cmac.icverrors);
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break;
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case WLAN_CIPHER_SUITE_BIP_GMAC_128:
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case WLAN_CIPHER_SUITE_BIP_GMAC_256:
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len = scnprintf(buf, sizeof(buf), "%u\n",
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key->u.aes_gmac.icverrors);
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break;
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default:
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return 0;
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}
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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}
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KEY_OPS(icverrors);
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static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_key *key = file->private_data;
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char buf[20];
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int len;
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if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)
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return -EINVAL;
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len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures);
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return simple_read_from_buffer(userbuf, count, ppos, buf, len);
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}
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KEY_OPS(mic_failures);
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static ssize_t key_key_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_key *key = file->private_data;
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int i, bufsize = 2 * key->conf.keylen + 2;
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char *buf = kmalloc(bufsize, GFP_KERNEL);
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char *p = buf;
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ssize_t res;
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if (!buf)
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return -ENOMEM;
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for (i = 0; i < key->conf.keylen; i++)
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p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
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p += scnprintf(p, bufsize+buf-p, "\n");
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res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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kfree(buf);
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return res;
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}
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KEY_OPS(key);
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#define DEBUGFS_ADD(name) \
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debugfs_create_file(#name, 0400, key->debugfs.dir, \
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key, &key_##name##_ops)
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#define DEBUGFS_ADD_W(name) \
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debugfs_create_file(#name, 0600, key->debugfs.dir, \
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key, &key_##name##_ops);
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void ieee80211_debugfs_key_add(struct ieee80211_key *key)
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{
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static int keycount;
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char buf[100];
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struct sta_info *sta;
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if (!key->local->debugfs.keys)
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return;
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sprintf(buf, "%d", keycount);
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key->debugfs.cnt = keycount;
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keycount++;
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key->debugfs.dir = debugfs_create_dir(buf,
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key->local->debugfs.keys);
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sta = key->sta;
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if (sta) {
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sprintf(buf, "../../netdev:%s/stations/%pM",
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sta->sdata->name, sta->sta.addr);
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key->debugfs.stalink =
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debugfs_create_symlink("station", key->debugfs.dir, buf);
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}
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DEBUGFS_ADD(keylen);
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DEBUGFS_ADD(flags);
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DEBUGFS_ADD(keyidx);
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DEBUGFS_ADD(hw_key_idx);
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DEBUGFS_ADD(algorithm);
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DEBUGFS_ADD_W(tx_spec);
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DEBUGFS_ADD(rx_spec);
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DEBUGFS_ADD(replays);
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DEBUGFS_ADD(icverrors);
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DEBUGFS_ADD(mic_failures);
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DEBUGFS_ADD(key);
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DEBUGFS_ADD(ifindex);
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};
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void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
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{
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if (!key)
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return;
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debugfs_remove_recursive(key->debugfs.dir);
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key->debugfs.dir = NULL;
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}
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void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
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{
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char buf[50];
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struct ieee80211_key *key;
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if (!sdata->vif.debugfs_dir)
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return;
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lockdep_assert_held(&sdata->local->key_mtx);
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debugfs_remove(sdata->debugfs.default_unicast_key);
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sdata->debugfs.default_unicast_key = NULL;
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if (sdata->default_unicast_key) {
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key = key_mtx_dereference(sdata->local,
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sdata->default_unicast_key);
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sprintf(buf, "../keys/%d", key->debugfs.cnt);
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sdata->debugfs.default_unicast_key =
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debugfs_create_symlink("default_unicast_key",
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sdata->vif.debugfs_dir, buf);
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}
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debugfs_remove(sdata->debugfs.default_multicast_key);
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sdata->debugfs.default_multicast_key = NULL;
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if (sdata->deflink.default_multicast_key) {
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key = key_mtx_dereference(sdata->local,
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sdata->deflink.default_multicast_key);
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sprintf(buf, "../keys/%d", key->debugfs.cnt);
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sdata->debugfs.default_multicast_key =
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debugfs_create_symlink("default_multicast_key",
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sdata->vif.debugfs_dir, buf);
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}
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}
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void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
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{
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char buf[50];
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struct ieee80211_key *key;
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if (!sdata->vif.debugfs_dir)
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return;
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key = key_mtx_dereference(sdata->local,
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sdata->deflink.default_mgmt_key);
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if (key) {
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sprintf(buf, "../keys/%d", key->debugfs.cnt);
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sdata->debugfs.default_mgmt_key =
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debugfs_create_symlink("default_mgmt_key",
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sdata->vif.debugfs_dir, buf);
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} else
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ieee80211_debugfs_key_remove_mgmt_default(sdata);
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}
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void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
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{
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if (!sdata)
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return;
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debugfs_remove(sdata->debugfs.default_mgmt_key);
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sdata->debugfs.default_mgmt_key = NULL;
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}
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void
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ieee80211_debugfs_key_add_beacon_default(struct ieee80211_sub_if_data *sdata)
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{
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char buf[50];
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struct ieee80211_key *key;
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if (!sdata->vif.debugfs_dir)
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return;
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key = key_mtx_dereference(sdata->local,
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sdata->deflink.default_beacon_key);
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if (key) {
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sprintf(buf, "../keys/%d", key->debugfs.cnt);
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sdata->debugfs.default_beacon_key =
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debugfs_create_symlink("default_beacon_key",
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sdata->vif.debugfs_dir, buf);
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} else {
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ieee80211_debugfs_key_remove_beacon_default(sdata);
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}
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}
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void
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ieee80211_debugfs_key_remove_beacon_default(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
if (!sdata)
|
|
return;
|
|
|
|
debugfs_remove(sdata->debugfs.default_beacon_key);
|
|
sdata->debugfs.default_beacon_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;
|
|
}
|