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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* File: key.c
*
* Purpose: Implement functions for 802.11i Key management
*
* Author: Jerry Chen
*
* Date: May 29, 2003
*
* Functions:
*
* Revision History:
*
*/
#include "mac.h"
#include "key.h"
#include "usbpipe.h"
int vnt_key_init_table(struct vnt_private *priv)
{
u8 i;
u8 data[MAX_KEY_TABLE];
for (i = 0; i < MAX_KEY_TABLE; i++)
data[i] = i;
return vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY,
0, 0, ARRAY_SIZE(data), data);
}
static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr,
struct ieee80211_key_conf *key, u32 key_type,
u32 mode, bool onfly_latch)
{
struct vnt_private *priv = hw->priv;
u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
u16 key_mode = 0;
u32 entry = 0;
u8 *bssid;
u8 key_inx = key->keyidx;
u8 i;
if (mac_addr)
bssid = mac_addr;
else
bssid = &broadcast[0];
if (key_type != VNT_KEY_DEFAULTKEY) {
for (i = 0; i < (MAX_KEY_TABLE - 1); i++) {
if (!test_bit(i, &priv->key_entry_inuse)) {
set_bit(i, &priv->key_entry_inuse);
key->hw_key_idx = i;
entry = key->hw_key_idx;
break;
}
}
}
switch (key_type) {
/* fallthrough */
case VNT_KEY_DEFAULTKEY:
/* default key last entry */
entry = MAX_KEY_TABLE - 1;
key->hw_key_idx = entry;
case VNT_KEY_ALLGROUP:
key_mode |= VNT_KEY_ALLGROUP;
if (onfly_latch)
key_mode |= VNT_KEY_ONFLY_ALL;
case VNT_KEY_GROUP_ADDRESS:
key_mode |= mode;
case VNT_KEY_GROUP:
key_mode |= (mode << 4);
key_mode |= VNT_KEY_GROUP;
break;
case VNT_KEY_PAIRWISE:
key_mode |= mode;
key_inx = 4;
/* Don't save entry for pairwise key for station mode */
if (priv->op_mode == NL80211_IFTYPE_STATION)
clear_bit(entry, &priv->key_entry_inuse);
break;
default:
return -EINVAL;
}
if (onfly_latch)
key_mode |= VNT_KEY_ONFLY;
if (mode == KEY_CTL_WEP) {
if (key->keylen == WLAN_KEY_LEN_WEP40)
key->key[15] &= 0x7f;
if (key->keylen == WLAN_KEY_LEN_WEP104)
key->key[15] |= 0x80;
}
vnt_mac_set_keyentry(priv, key_mode, entry, key_inx, bssid, key->key);
return 0;
}
int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
struct ieee80211_vif *vif, struct ieee80211_key_conf *key)
{
struct ieee80211_bss_conf *conf = &vif->bss_conf;
struct vnt_private *priv = hw->priv;
u8 *mac_addr = NULL;
u8 key_dec_mode = 0;
int ret = 0, u;
if (sta)
mac_addr = &sta->addr[0];
switch (key->cipher) {
case 0:
for (u = 0 ; u < MAX_KEY_TABLE; u++)
vnt_mac_disable_keyentry(priv, u);
return ret;
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
for (u = 0; u < MAX_KEY_TABLE; u++)
vnt_mac_disable_keyentry(priv, u);
vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY,
KEY_CTL_WEP, true);
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
return ret;
case WLAN_CIPHER_SUITE_TKIP:
key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
key_dec_mode = KEY_CTL_TKIP;
break;
case WLAN_CIPHER_SUITE_CCMP:
if (priv->local_id <= MAC_REVISION_A1)
return -EINVAL;
key_dec_mode = KEY_CTL_CCMP;
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
}
if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
vnt_set_keymode(hw, mac_addr, key, VNT_KEY_PAIRWISE,
key_dec_mode, true);
} else {
vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY,
key_dec_mode, true);
vnt_set_keymode(hw, (u8 *)conf->bssid, key,
VNT_KEY_GROUP_ADDRESS, key_dec_mode, true);
}
return 0;
}
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