drivers/staging/vt6656/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  * Functions:
  15  *
  16  * Revision History:
  17  *
  18  */
  19
  20 #include "mac.h"
  21 #include "key.h"
  22 #include "usbpipe.h"
  23
  24 int vnt_key_init_table(struct vnt_private *priv)
  25 {
  26         u8 i;
  27         u8 data[MAX_KEY_TABLE];
  28
  29         for (i = 0; i < MAX_KEY_TABLE; i++)
  30                 data[i] = i;
  31
  32         return vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY,
  33                         0, 0, ARRAY_SIZE(data), data);
  34 }
  35
  36 static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr,
  37                            struct ieee80211_key_conf *key, u32 key_type,
  38                            u32 mode, bool onfly_latch)
  39 {
  40         struct vnt_private *priv = hw->priv;
  41         u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  42         u16 key_mode = 0;
  43         u32 entry = 0;
  44         u8 *bssid;
  45         u8 key_inx = key->keyidx;
  46         u8 i;
  47
  48         if (mac_addr)
  49                 bssid = mac_addr;
  50         else
  51                 bssid = &broadcast[0];
  52
  53         if (key_type != VNT_KEY_DEFAULTKEY) {
  54                 for (i = 0; i < (MAX_KEY_TABLE - 1); i++) {
  55                         if (!test_bit(i, &priv->key_entry_inuse)) {
  56                                 set_bit(i, &priv->key_entry_inuse);
  57
  58                                 key->hw_key_idx = i;
  59                                 entry = key->hw_key_idx;
  60                                 break;
  61                         }
  62                 }
  63         }
  64
  65         switch (key_type) {
  66         case VNT_KEY_DEFAULTKEY:
  67                 /* default key last entry */
  68                 entry = MAX_KEY_TABLE - 1;
  69                 key->hw_key_idx = entry;
  70                 /* fall through */
  71         case VNT_KEY_ALLGROUP:
  72                 key_mode |= VNT_KEY_ALLGROUP;
  73                 if (onfly_latch)
  74                         key_mode |= VNT_KEY_ONFLY_ALL;
  75                 /* fall through */
  76         case VNT_KEY_GROUP_ADDRESS:
  77                 key_mode |= mode;
  78                 /* fall through */
  79         case VNT_KEY_GROUP:
  80                 key_mode |= (mode << 4);
  81                 key_mode |= VNT_KEY_GROUP;
  82                 break;
  83         case  VNT_KEY_PAIRWISE:
  84                 key_mode |= mode;
  85                 key_inx = 4;
  86                 break;
  87         default:
  88                 return -EINVAL;
  89         }
  90
  91         if (onfly_latch)
  92                 key_mode |= VNT_KEY_ONFLY;
  93
  94         if (mode == KEY_CTL_WEP) {
  95                 if (key->keylen == WLAN_KEY_LEN_WEP40)
  96                         key->key[15] &= 0x7f;
  97                 if (key->keylen == WLAN_KEY_LEN_WEP104)
  98                         key->key[15] |= 0x80;
  99         }
 100
 101         vnt_mac_set_keyentry(priv, key_mode, entry, key_inx, bssid, key->key);
 102
 103         return 0;
 104 }
 105
 106 int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
 107                  struct ieee80211_vif *vif, struct ieee80211_key_conf *key)
 108 {
 109         struct vnt_private *priv = hw->priv;
 110         u8 *mac_addr = NULL;
 111         u8 key_dec_mode = 0;
 112         int ret = 0, u;
 113
 114         if (sta)
 115                 mac_addr = &sta->addr[0];
 116
 117         switch (key->cipher) {
 118         case 0:
 119                 for (u = 0 ; u < MAX_KEY_TABLE; u++)
 120                         vnt_mac_disable_keyentry(priv, u);
 121                 return ret;
 122
 123         case WLAN_CIPHER_SUITE_WEP40:
 124         case WLAN_CIPHER_SUITE_WEP104:
 125                 for (u = 0; u < MAX_KEY_TABLE; u++)
 126                         vnt_mac_disable_keyentry(priv, u);
 127
 128                 vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY,
 129                                 KEY_CTL_WEP, true);
 130
 131                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 132
 133                 return ret;
 134         case WLAN_CIPHER_SUITE_TKIP:
 135                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 136                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 137
 138                 key_dec_mode = KEY_CTL_TKIP;
 139
 140                 break;
 141         case WLAN_CIPHER_SUITE_CCMP:
 142                 if (priv->local_id <= MAC_REVISION_A1)
 143                         return -EOPNOTSUPP;
 144
 145                 key_dec_mode = KEY_CTL_CCMP;
 146
 147                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 148                 break;
 149         default:
 150                 return -EOPNOTSUPP;
 151         }
 152
 153         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 154                 vnt_set_keymode(hw, mac_addr, key, VNT_KEY_PAIRWISE,
 155                                 key_dec_mode, true);
 156         else
 157                 vnt_set_keymode(hw, mac_addr, key, VNT_KEY_GROUP_ADDRESS,
 158                                 key_dec_mode, true);
 159
 160         return 0;
 161 }