drivers/staging/vt6655/key.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  *
  20  * File: key.c
  21  *
  22  * Purpose: Implement functions for 802.11i Key management
  23  *
  24  * Author: Jerry Chen
  25  *
  26  * Date: May 29, 2003
  27  *
  28  */
  29
  30 #include "tmacro.h"
  31 #include "key.h"
  32 #include "mac.h"
  33
  34 int vnt_key_init_table(struct vnt_private *priv)
  35 {
  36         u32 i;
  37
  38         for (i = 0; i < MAX_KEY_TABLE; i++)
  39                 MACvDisableKeyEntry(priv->PortOffset, i);
  40
  41         return 0;
  42 }
  43
  44 static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr,
  45         struct ieee80211_key_conf *key, u32 key_type, u32 mode,
  46         bool onfly_latch)
  47 {
  48         struct vnt_private *priv = hw->priv;
  49         u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  50         u16 key_mode = 0;
  51         u32 entry = 0;
  52         u8 *bssid;
  53         u8 key_inx = key->keyidx;
  54         u8 i;
  55
  56         if (mac_addr)
  57                 bssid = mac_addr;
  58         else
  59                 bssid = &broadcast[0];
  60
  61         if (key_type != VNT_KEY_DEFAULTKEY) {
  62                 for (i = 0; i < (MAX_KEY_TABLE - 1); i++) {
  63                         if (!test_bit(i, &priv->key_entry_inuse)) {
  64                                 set_bit(i, &priv->key_entry_inuse);
  65
  66                                 key->hw_key_idx = i;
  67                                 entry = key->hw_key_idx;
  68                                 break;
  69                         }
  70                 }
  71         }
  72
  73         switch (key_type) {
  74         /* fallthrough */
  75         case VNT_KEY_DEFAULTKEY:
  76                 /* default key last entry */
  77                 entry = MAX_KEY_TABLE - 1;
  78                 key->hw_key_idx = entry;
  79         case VNT_KEY_ALLGROUP:
  80                 key_mode |= VNT_KEY_ALLGROUP;
  81                 if (onfly_latch)
  82                         key_mode |= VNT_KEY_ONFLY_ALL;
  83         case VNT_KEY_GROUP_ADDRESS:
  84                 key_mode |= mode;
  85         case VNT_KEY_GROUP:
  86                 key_mode |= (mode << 4);
  87                 key_mode |= VNT_KEY_GROUP;
  88                 break;
  89         case  VNT_KEY_PAIRWISE:
  90                 key_mode |= mode;
  91                 key_inx = 4;
  92                 break;
  93         default:
  94                 return -EINVAL;
  95         }
  96
  97         if (onfly_latch)
  98                 key_mode |= VNT_KEY_ONFLY;
  99
 100         if (mode == KEY_CTL_WEP) {
 101                 if (key->keylen == WLAN_KEY_LEN_WEP40)
 102                         key->key[15] &= 0x7f;
 103                 if (key->keylen == WLAN_KEY_LEN_WEP104)
 104                         key->key[15] |= 0x80;
 105         }
 106
 107         MACvSetKeyEntry(priv->PortOffset, key_mode, entry, key_inx,
 108                         bssid, (u32 *)key->key, priv->byLocalID);
 109
 110         return 0;
 111 }
 112
 113 int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
 114                  struct ieee80211_vif *vif, struct ieee80211_key_conf *key)
 115 {
 116         struct ieee80211_bss_conf *conf = &vif->bss_conf;
 117         struct vnt_private *priv = hw->priv;
 118         u8 *mac_addr = NULL;
 119         u8 key_dec_mode = 0;
 120         int ret = 0;
 121         u32 u;
 122
 123         if (sta)
 124                 mac_addr = &sta->addr[0];
 125
 126         switch (key->cipher) {
 127         case 0:
 128                 for (u = 0 ; u < MAX_KEY_TABLE; u++)
 129                         MACvDisableKeyEntry(priv->PortOffset, u);
 130                 return ret;
 131
 132         case WLAN_CIPHER_SUITE_WEP40:
 133         case WLAN_CIPHER_SUITE_WEP104:
 134                 for (u = 0; u < MAX_KEY_TABLE; u++)
 135                         MACvDisableKeyEntry(priv->PortOffset, u);
 136
 137                 vnt_set_keymode(hw, mac_addr,
 138                                 key, VNT_KEY_DEFAULTKEY, KEY_CTL_WEP, true);
 139
 140                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 141
 142                 return ret;
 143         case WLAN_CIPHER_SUITE_TKIP:
 144                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 145                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 146
 147                 key_dec_mode = KEY_CTL_TKIP;
 148
 149                 break;
 150         case WLAN_CIPHER_SUITE_CCMP:
 151                 key_dec_mode = KEY_CTL_CCMP;
 152
 153                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 154         }
 155
 156         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 157                 vnt_set_keymode(hw, mac_addr,
 158                                 key, VNT_KEY_PAIRWISE, key_dec_mode, true);
 159         } else {
 160                 vnt_set_keymode(hw, mac_addr,
 161                                 key, VNT_KEY_DEFAULTKEY, key_dec_mode, true);
 162
 163                 vnt_set_keymode(hw, (u8 *)conf->bssid,
 164                                 key, VNT_KEY_GROUP_ADDRESS, key_dec_mode, true);
 165         }
 166
 167         return 0;
 168 }