// SPDX-License-Identifier: GPL-2.0-only/* * Copyright 2003-2005	Devicescape Software, Inc. * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz> * Copyright 2007	Johannes Berg <johannes@sipsolutions.net> * Copyright (C) 2015	Intel Deutschland GmbH * Copyright (C) 2021-2023   Intel Corporation */ #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_X(name) KEY_READ(name, name, "0x%x\n") #define KEY_OPS(name)							\static const struct debugfs_short_fops key_ ##name## _ops = {		\	.read = key_##name##_read,					\	.llseek = generic_file_llseek,					\} #define KEY_OPS_W(name)							\static const struct debugfs_short_fops key_ ##name## _ops = {		\	.read = key_##name##_read,					\	.write = key_##name##_write,					\	.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 debugfs_short_fops key_ ##name## _ops = {		\	.read = key_conf_##name##_read,					\	.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_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_write(struct file *file, const char __user *userbuf,				 size_t count, loff_t *ppos){	struct ieee80211_key *key = file->private_data;	u64 pn;	int ret; 	switch (key->conf.cipher) {	case WLAN_CIPHER_SUITE_WEP40:	case WLAN_CIPHER_SUITE_WEP104:		return -EINVAL;	case WLAN_CIPHER_SUITE_TKIP:		/* not supported yet */		return -EOPNOTSUPP;	case WLAN_CIPHER_SUITE_CCMP:	case WLAN_CIPHER_SUITE_CCMP_256:	case WLAN_CIPHER_SUITE_AES_CMAC:	case WLAN_CIPHER_SUITE_BIP_CMAC_256:	case WLAN_CIPHER_SUITE_BIP_GMAC_128:	case WLAN_CIPHER_SUITE_BIP_GMAC_256:	case WLAN_CIPHER_SUITE_GCMP:	case WLAN_CIPHER_SUITE_GCMP_256:		ret = kstrtou64_from_user(userbuf, count, 16, &pn);		if (ret)			return ret;		/* PN is a 48-bit counter */		if (pn >= (1ULL << 48))			return -ERANGE;		atomic64_set(&key->conf.tx_pn, pn);		return count;	default:		return 0;	}} static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,				size_t count, loff_t *ppos){	u64 pn;	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:		pn = atomic64_read(&key->conf.tx_pn);		len = scnprintf(buf, sizeof(buf), "%08x %04x\n",				TKIP_PN_TO_IV32(pn),				TKIP_PN_TO_IV16(pn));		break;	case WLAN_CIPHER_SUITE_CCMP:	case WLAN_CIPHER_SUITE_CCMP_256:	case WLAN_CIPHER_SUITE_AES_CMAC:	case WLAN_CIPHER_SUITE_BIP_CMAC_256:	case WLAN_CIPHER_SUITE_BIP_GMAC_128:	case WLAN_CIPHER_SUITE_BIP_GMAC_256:	case WLAN_CIPHER_SUITE_GCMP:	case WLAN_CIPHER_SUITE_GCMP_256:		pn = atomic64_read(&key->conf.tx_pn);		len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",				(u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),				(u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);		break;	default:		return 0;	}	return simple_read_from_buffer(userbuf, count, ppos, buf, len);}KEY_OPS_W(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*IEEE80211_NUM_TIDS+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 < IEEE80211_NUM_TIDS; 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:	case WLAN_CIPHER_SUITE_CCMP_256:		for (i = 0; i < IEEE80211_NUM_TIDS + 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:	case WLAN_CIPHER_SUITE_BIP_CMAC_256:		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;	case WLAN_CIPHER_SUITE_BIP_GMAC_128:	case WLAN_CIPHER_SUITE_BIP_GMAC_256:		rpn = key->u.aes_gmac.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;	case WLAN_CIPHER_SUITE_GCMP:	case WLAN_CIPHER_SUITE_GCMP_256:		for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {			rpn = key->u.gcmp.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;	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:	case WLAN_CIPHER_SUITE_CCMP_256:		len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);		break;	case WLAN_CIPHER_SUITE_AES_CMAC:	case WLAN_CIPHER_SUITE_BIP_CMAC_256:		len = scnprintf(buf, sizeof(buf), "%u\n",				key->u.aes_cmac.replays);		break;	case WLAN_CIPHER_SUITE_BIP_GMAC_128:	case WLAN_CIPHER_SUITE_BIP_GMAC_256:		len = scnprintf(buf, sizeof(buf), "%u\n",				key->u.aes_gmac.replays);		break;	case WLAN_CIPHER_SUITE_GCMP:	case WLAN_CIPHER_SUITE_GCMP_256:		len = scnprintf(buf, sizeof(buf), "%u\n", key->u.gcmp.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:	case WLAN_CIPHER_SUITE_BIP_CMAC_256:		len = scnprintf(buf, sizeof(buf), "%u\n",				key->u.aes_cmac.icverrors);		break;	case WLAN_CIPHER_SUITE_BIP_GMAC_128:	case WLAN_CIPHER_SUITE_BIP_GMAC_256:		len = scnprintf(buf, sizeof(buf), "%u\n",				key->u.aes_gmac.icverrors);		break;	default:		return 0;	}	return simple_read_from_buffer(userbuf, count, ppos, buf, len);}KEY_OPS(icverrors); static ssize_t key_mic_failures_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; 	if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP)		return -EINVAL; 	len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures); 	return simple_read_from_buffer(userbuf, count, ppos, buf, len);}KEY_OPS(mic_failures); 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)#define DEBUGFS_ADD_W(name) \	debugfs_create_file(#name, 0600, key->debugfs.dir, \			    key, &key_##name##_ops); void ieee80211_debugfs_key_add(struct ieee80211_key *key){	static int keycount;	char buf[100];	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); 	sta = key->sta;	if (sta) {		sprintf(buf, "../../netdev:%s/stations/%pM",			sta->sdata->name, sta->sta.addr);		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(algorithm);	DEBUGFS_ADD_W(tx_spec);	DEBUGFS_ADD(rx_spec);	DEBUGFS_ADD(replays);	DEBUGFS_ADD(icverrors);	DEBUGFS_ADD(mic_failures);	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->vif.debugfs_dir)		return; 	lockdep_assert_wiphy(sdata->local->hw.wiphy); 	debugfs_remove(sdata->debugfs.default_unicast_key);	sdata->debugfs.default_unicast_key = NULL; 	if (sdata->default_unicast_key) {		key = wiphy_dereference(sdata->local->hw.wiphy,					sdata->default_unicast_key);		sprintf(buf, "../keys/%d", key->debugfs.cnt);		sdata->debugfs.default_unicast_key =			debugfs_create_symlink("default_unicast_key",					       sdata->vif.debugfs_dir, buf);	} 	debugfs_remove(sdata->debugfs.default_multicast_key);	sdata->debugfs.default_multicast_key = NULL; 	if (sdata->deflink.default_multicast_key) {		key = wiphy_dereference(sdata->local->hw.wiphy,					sdata->deflink.default_multicast_key);		sprintf(buf, "../keys/%d", key->debugfs.cnt);		sdata->debugfs.default_multicast_key =			debugfs_create_symlink("default_multicast_key",					       sdata->vif.debugfs_dir, buf);	}} 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;} voidieee80211_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;}