| /* |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * |
| * 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) |
| { |
| int ret; |
| u8 i; |
| u8 data[MAX_KEY_TABLE]; |
| |
| for (i = 0; i < MAX_KEY_TABLE; i++) |
| data[i] = i; |
| |
| ret = vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY, |
| 0, 0, ARRAY_SIZE(data), data); |
| |
| return ret; |
| } |
| |
| 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->byLocalID <= 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; |
| } |