drivers/staging/vt6655/key.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   4  * All rights reserved.
   5  *
   6  * File: key.c
   7  *
   8  * Purpose: Implement functions for 802.11i Key management
   9  *
  10  * Author: Jerry Chen
  11  *
  12  * Date: May 29, 2003
  13  *
  14  */
  15
  16 #include "tmacro.h"
  17 #include "key.h"
  18 #include "mac.h"
  19
  20 static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr,
  21                            struct ieee80211_key_conf *key, u32 key_type,
  22                            u32 mode, bool onfly_latch)
  23 {
  24         struct vnt_private *priv = hw->priv;
  25         u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  26         u16 key_mode = 0;
  27         u32 entry = 0;
  28         u8 *bssid;
  29         u8 key_inx = key->keyidx;
  30         u8 i;
  31
  32         if (mac_addr)
  33                 bssid = mac_addr;
  34         else
  35                 bssid = &broadcast[0];
  36
  37         if (key_type != VNT_KEY_DEFAULTKEY) {
  38                 for (i = 0; i < (MAX_KEY_TABLE - 1); i++) {
  39                         if (!test_bit(i, &priv->key_entry_inuse)) {
  40                                 set_bit(i, &priv->key_entry_inuse);
  41
  42                                 key->hw_key_idx = i;
  43                                 entry = key->hw_key_idx;
  44                                 break;
  45                         }
  46                 }
  47         }
  48
  49         switch (key_type) {
  50         case VNT_KEY_DEFAULTKEY:
  51                 /* default key last entry */
  52                 entry = MAX_KEY_TABLE - 1;
  53                 key->hw_key_idx = entry;
  54                 /* fall through */
  55         case VNT_KEY_ALLGROUP:
  56                 key_mode |= VNT_KEY_ALLGROUP;
  57                 if (onfly_latch)
  58                         key_mode |= VNT_KEY_ONFLY_ALL;
  59                 /* fall through */
  60         case VNT_KEY_GROUP_ADDRESS:
  61                 key_mode |= mode;
  62                 /* fall through */
  63         case VNT_KEY_GROUP:
  64                 key_mode |= (mode << 4);
  65                 key_mode |= VNT_KEY_GROUP;
  66                 break;
  67         case  VNT_KEY_PAIRWISE:
  68                 key_mode |= mode;
  69                 key_inx = 4;
  70                 break;
  71         default:
  72                 return -EINVAL;
  73         }
  74
  75         if (onfly_latch)
  76                 key_mode |= VNT_KEY_ONFLY;
  77
  78         if (mode == KEY_CTL_WEP) {
  79                 if (key->keylen == WLAN_KEY_LEN_WEP40)
  80                         key->key[15] &= 0x7f;
  81                 if (key->keylen == WLAN_KEY_LEN_WEP104)
  82                         key->key[15] |= 0x80;
  83         }
  84
  85         MACvSetKeyEntry(priv, key_mode, entry, key_inx,
  86                         bssid, (u32 *)key->key, priv->byLocalID);
  87
  88         return 0;
  89 }
  90
  91 int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
  92                  struct ieee80211_vif *vif, struct ieee80211_key_conf *key)
  93 {
  94         struct ieee80211_bss_conf *conf = &vif->bss_conf;
  95         struct vnt_private *priv = hw->priv;
  96         u8 *mac_addr = NULL;
  97         u8 key_dec_mode = 0;
  98         int ret = 0;
  99         u32 u;
 100
 101         if (sta)
 102                 mac_addr = &sta->addr[0];
 103
 104         switch (key->cipher) {
 105         case 0:
 106                 for (u = 0 ; u < MAX_KEY_TABLE; u++)
 107                         MACvDisableKeyEntry(priv, u);
 108                 return ret;
 109
 110         case WLAN_CIPHER_SUITE_WEP40:
 111         case WLAN_CIPHER_SUITE_WEP104:
 112                 for (u = 0; u < MAX_KEY_TABLE; u++)
 113                         MACvDisableKeyEntry(priv, u);
 114
 115                 vnt_set_keymode(hw, mac_addr,
 116                                 key, VNT_KEY_DEFAULTKEY, KEY_CTL_WEP, true);
 117
 118                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 119
 120                 return ret;
 121         case WLAN_CIPHER_SUITE_TKIP:
 122                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 123                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 124
 125                 key_dec_mode = KEY_CTL_TKIP;
 126
 127                 break;
 128         case WLAN_CIPHER_SUITE_CCMP:
 129                 key_dec_mode = KEY_CTL_CCMP;
 130
 131                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 132         }
 133
 134         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 135                 vnt_set_keymode(hw, mac_addr,
 136                                 key, VNT_KEY_PAIRWISE, key_dec_mode, true);
 137         } else {
 138                 vnt_set_keymode(hw, mac_addr,
 139                                 key, VNT_KEY_DEFAULTKEY, key_dec_mode, true);
 140
 141                 vnt_set_keymode(hw, (u8 *)conf->bssid,
 142                                 key, VNT_KEY_GROUP_ADDRESS, key_dec_mode, true);
 143         }
 144
 145         return 0;
 146 }