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5449c685 FB |
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 | * | |
5449c685 FB |
15 | * File: key.c |
16 | * | |
17 | * Purpose: Implement functions for 802.11i Key management | |
18 | * | |
19 | * Author: Jerry Chen | |
20 | * | |
21 | * Date: May 29, 2003 | |
22 | * | |
5449c685 FB |
23 | */ |
24 | ||
5449c685 | 25 | #include "tmacro.h" |
5449c685 | 26 | #include "key.h" |
5449c685 | 27 | #include "mac.h" |
5449c685 | 28 | |
fee7506a MP |
29 | static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr, |
30 | struct ieee80211_key_conf *key, u32 key_type, u32 mode, | |
31 | bool onfly_latch) | |
32 | { | |
33 | struct vnt_private *priv = hw->priv; | |
34 | u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
35 | u16 key_mode = 0; | |
36 | u32 entry = 0; | |
37 | u8 *bssid; | |
38 | u8 key_inx = key->keyidx; | |
39 | u8 i; | |
40 | ||
41 | if (mac_addr) | |
42 | bssid = mac_addr; | |
43 | else | |
44 | bssid = &broadcast[0]; | |
45 | ||
46 | if (key_type != VNT_KEY_DEFAULTKEY) { | |
47 | for (i = 0; i < (MAX_KEY_TABLE - 1); i++) { | |
48 | if (!test_bit(i, &priv->key_entry_inuse)) { | |
49 | set_bit(i, &priv->key_entry_inuse); | |
50 | ||
51 | key->hw_key_idx = i; | |
52 | entry = key->hw_key_idx; | |
53 | break; | |
54 | } | |
55 | } | |
56 | } | |
57 | ||
58 | switch (key_type) { | |
59 | /* fallthrough */ | |
60 | case VNT_KEY_DEFAULTKEY: | |
61 | /* default key last entry */ | |
62 | entry = MAX_KEY_TABLE - 1; | |
63 | key->hw_key_idx = entry; | |
64 | case VNT_KEY_ALLGROUP: | |
65 | key_mode |= VNT_KEY_ALLGROUP; | |
66 | if (onfly_latch) | |
67 | key_mode |= VNT_KEY_ONFLY_ALL; | |
68 | case VNT_KEY_GROUP_ADDRESS: | |
69 | key_mode |= mode; | |
70 | case VNT_KEY_GROUP: | |
71 | key_mode |= (mode << 4); | |
72 | key_mode |= VNT_KEY_GROUP; | |
73 | break; | |
74 | case VNT_KEY_PAIRWISE: | |
75 | key_mode |= mode; | |
76 | key_inx = 4; | |
77 | break; | |
78 | default: | |
79 | return -EINVAL; | |
80 | } | |
81 | ||
82 | if (onfly_latch) | |
83 | key_mode |= VNT_KEY_ONFLY; | |
84 | ||
85 | if (mode == KEY_CTL_WEP) { | |
86 | if (key->keylen == WLAN_KEY_LEN_WEP40) | |
87 | key->key[15] &= 0x7f; | |
88 | if (key->keylen == WLAN_KEY_LEN_WEP104) | |
89 | key->key[15] |= 0x80; | |
90 | } | |
91 | ||
f9f853af | 92 | MACvSetKeyEntry(priv, key_mode, entry, key_inx, |
fee7506a MP |
93 | bssid, (u32 *)key->key, priv->byLocalID); |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta, | |
99 | struct ieee80211_vif *vif, struct ieee80211_key_conf *key) | |
100 | { | |
101 | struct ieee80211_bss_conf *conf = &vif->bss_conf; | |
102 | struct vnt_private *priv = hw->priv; | |
103 | u8 *mac_addr = NULL; | |
104 | u8 key_dec_mode = 0; | |
105 | int ret = 0; | |
106 | u32 u; | |
107 | ||
108 | if (sta) | |
109 | mac_addr = &sta->addr[0]; | |
110 | ||
111 | switch (key->cipher) { | |
112 | case 0: | |
113 | for (u = 0 ; u < MAX_KEY_TABLE; u++) | |
f9f853af | 114 | MACvDisableKeyEntry(priv, u); |
fee7506a MP |
115 | return ret; |
116 | ||
117 | case WLAN_CIPHER_SUITE_WEP40: | |
118 | case WLAN_CIPHER_SUITE_WEP104: | |
119 | for (u = 0; u < MAX_KEY_TABLE; u++) | |
f9f853af | 120 | MACvDisableKeyEntry(priv, u); |
fee7506a MP |
121 | |
122 | vnt_set_keymode(hw, mac_addr, | |
123 | key, VNT_KEY_DEFAULTKEY, KEY_CTL_WEP, true); | |
124 | ||
125 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
126 | ||
127 | return ret; | |
128 | case WLAN_CIPHER_SUITE_TKIP: | |
129 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
130 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
131 | ||
132 | key_dec_mode = KEY_CTL_TKIP; | |
133 | ||
134 | break; | |
135 | case WLAN_CIPHER_SUITE_CCMP: | |
136 | key_dec_mode = KEY_CTL_CCMP; | |
137 | ||
138 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
139 | } | |
140 | ||
141 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { | |
142 | vnt_set_keymode(hw, mac_addr, | |
143 | key, VNT_KEY_PAIRWISE, key_dec_mode, true); | |
144 | } else { | |
145 | vnt_set_keymode(hw, mac_addr, | |
146 | key, VNT_KEY_DEFAULTKEY, key_dec_mode, true); | |
147 | ||
148 | vnt_set_keymode(hw, (u8 *)conf->bssid, | |
149 | key, VNT_KEY_GROUP_ADDRESS, key_dec_mode, true); | |
150 | } | |
151 | ||
152 | return 0; | |
153 | } |