// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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* All rights reserved.
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*
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* File: key.c
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*
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* Purpose: Implement functions for 802.11i Key management
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*
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* Author: Jerry Chen
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*
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* Date: May 29, 2003
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*
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* Functions:
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*
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* Revision History:
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*
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*/
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#include "mac.h"
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#include "key.h"
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#include "usbpipe.h"
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int vnt_key_init_table(struct vnt_private *priv)
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{
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u8 i;
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u8 data[MAX_KEY_TABLE];
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for (i = 0; i < MAX_KEY_TABLE; i++)
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data[i] = i;
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return vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY,
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0, 0, ARRAY_SIZE(data), data);
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}
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static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr,
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struct ieee80211_key_conf *key, u32 key_type,
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u32 mode)
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{
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struct vnt_private *priv = hw->priv;
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u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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u16 key_mode = 0;
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u32 entry = 0;
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u8 *bssid;
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u8 key_inx = key->keyidx;
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u8 i;
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if (mac_addr)
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bssid = mac_addr;
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else
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bssid = &broadcast[0];
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if (key_type != VNT_KEY_DEFAULTKEY) {
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for (i = 0; i < (MAX_KEY_TABLE - 1); i++) {
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if (!test_bit(i, &priv->key_entry_inuse)) {
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set_bit(i, &priv->key_entry_inuse);
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key->hw_key_idx = i;
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entry = key->hw_key_idx;
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break;
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}
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}
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}
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switch (key_type) {
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case VNT_KEY_DEFAULTKEY:
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/* default key last entry */
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entry = MAX_KEY_TABLE - 1;
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key->hw_key_idx = entry;
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fallthrough;
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case VNT_KEY_GROUP_ADDRESS:
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key_mode = mode | (mode << 4);
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break;
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case VNT_KEY_GROUP:
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key_mode = mode << 4;
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break;
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case VNT_KEY_PAIRWISE:
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key_mode |= mode;
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key_inx = 4;
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break;
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default:
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return -EINVAL;
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}
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key_mode |= key_type;
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if (mode == KEY_CTL_WEP) {
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if (key->keylen == WLAN_KEY_LEN_WEP40)
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key->key[15] &= 0x7f;
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if (key->keylen == WLAN_KEY_LEN_WEP104)
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key->key[15] |= 0x80;
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}
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return vnt_mac_set_keyentry(priv, key_mode, entry,
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key_inx, bssid, key->key);
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}
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int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
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struct ieee80211_vif *vif, struct ieee80211_key_conf *key)
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{
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struct vnt_private *priv = hw->priv;
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u8 *mac_addr = NULL;
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u8 key_dec_mode = 0;
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if (sta)
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mac_addr = &sta->addr[0];
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switch (key->cipher) {
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case WLAN_CIPHER_SUITE_WEP40:
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case WLAN_CIPHER_SUITE_WEP104:
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vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY,
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KEY_CTL_WEP);
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key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
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return vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY,
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KEY_CTL_WEP);
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case WLAN_CIPHER_SUITE_TKIP:
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key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
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key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
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key_dec_mode = KEY_CTL_TKIP;
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break;
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case WLAN_CIPHER_SUITE_CCMP:
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if (priv->local_id <= MAC_REVISION_A1)
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return -EOPNOTSUPP;
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key_dec_mode = KEY_CTL_CCMP;
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key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
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break;
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default:
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return -EOPNOTSUPP;
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}
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if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
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return vnt_set_keymode(hw, mac_addr, key, VNT_KEY_PAIRWISE,
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key_dec_mode);
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return vnt_set_keymode(hw, mac_addr, key,
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VNT_KEY_GROUP_ADDRESS, key_dec_mode);
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}
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