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92b96797 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 | * | |
92b96797 FB |
15 | * |
16 | * File: key.c | |
17 | * | |
18 | * Purpose: Implement functions for 802.11i Key management | |
19 | * | |
20 | * Author: Jerry Chen | |
21 | * | |
22 | * Date: May 29, 2003 | |
23 | * | |
24 | * Functions: | |
92b96797 FB |
25 | * |
26 | * Revision History: | |
27 | * | |
28 | */ | |
29 | ||
11d404cb | 30 | #include "mac.h" |
92b96797 | 31 | #include "key.h" |
62c8526d | 32 | #include "usbpipe.h" |
92b96797 | 33 | |
d1eb5003 MP |
34 | int vnt_key_init_table(struct vnt_private *priv) |
35 | { | |
d1eb5003 MP |
36 | u8 i; |
37 | u8 data[MAX_KEY_TABLE]; | |
38 | ||
39 | for (i = 0; i < MAX_KEY_TABLE; i++) | |
40 | data[i] = i; | |
41 | ||
88c9cc00 | 42 | return vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY, |
d1eb5003 | 43 | 0, 0, ARRAY_SIZE(data), data); |
d1eb5003 MP |
44 | } |
45 | ||
46 | static int vnt_set_keymode(struct ieee80211_hw *hw, u8 *mac_addr, | |
47 | struct ieee80211_key_conf *key, u32 key_type, u32 mode, | |
48 | bool onfly_latch) | |
49 | { | |
50 | struct vnt_private *priv = hw->priv; | |
51 | u8 broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
52 | u16 key_mode = 0; | |
53 | u32 entry = 0; | |
54 | u8 *bssid; | |
55 | u8 key_inx = key->keyidx; | |
56 | u8 i; | |
57 | ||
58 | if (mac_addr) | |
59 | bssid = mac_addr; | |
60 | else | |
61 | bssid = &broadcast[0]; | |
62 | ||
63 | if (key_type != VNT_KEY_DEFAULTKEY) { | |
64 | for (i = 0; i < (MAX_KEY_TABLE - 1); i++) { | |
65 | if (!test_bit(i, &priv->key_entry_inuse)) { | |
66 | set_bit(i, &priv->key_entry_inuse); | |
67 | ||
68 | key->hw_key_idx = i; | |
69 | entry = key->hw_key_idx; | |
70 | break; | |
71 | } | |
72 | } | |
73 | } | |
74 | ||
75 | switch (key_type) { | |
76 | /* fallthrough */ | |
77 | case VNT_KEY_DEFAULTKEY: | |
78 | /* default key last entry */ | |
79 | entry = MAX_KEY_TABLE - 1; | |
80 | key->hw_key_idx = entry; | |
81 | case VNT_KEY_ALLGROUP: | |
82 | key_mode |= VNT_KEY_ALLGROUP; | |
83 | if (onfly_latch) | |
84 | key_mode |= VNT_KEY_ONFLY_ALL; | |
85 | case VNT_KEY_GROUP_ADDRESS: | |
86 | key_mode |= mode; | |
87 | case VNT_KEY_GROUP: | |
88 | key_mode |= (mode << 4); | |
89 | key_mode |= VNT_KEY_GROUP; | |
90 | break; | |
91 | case VNT_KEY_PAIRWISE: | |
92 | key_mode |= mode; | |
93 | key_inx = 4; | |
f9ef05ce MP |
94 | /* Don't save entry for pairwise key for station mode */ |
95 | if (priv->op_mode == NL80211_IFTYPE_STATION) | |
96 | clear_bit(entry, &priv->key_entry_inuse); | |
d1eb5003 MP |
97 | break; |
98 | default: | |
99 | return -EINVAL; | |
100 | } | |
101 | ||
102 | if (onfly_latch) | |
103 | key_mode |= VNT_KEY_ONFLY; | |
104 | ||
105 | if (mode == KEY_CTL_WEP) { | |
106 | if (key->keylen == WLAN_KEY_LEN_WEP40) | |
107 | key->key[15] &= 0x7f; | |
108 | if (key->keylen == WLAN_KEY_LEN_WEP104) | |
109 | key->key[15] |= 0x80; | |
110 | } | |
111 | ||
112 | vnt_mac_set_keyentry(priv, key_mode, entry, key_inx, bssid, key->key); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | int vnt_set_keys(struct ieee80211_hw *hw, struct ieee80211_sta *sta, | |
118 | struct ieee80211_vif *vif, struct ieee80211_key_conf *key) | |
119 | { | |
120 | struct ieee80211_bss_conf *conf = &vif->bss_conf; | |
121 | struct vnt_private *priv = hw->priv; | |
122 | u8 *mac_addr = NULL; | |
123 | u8 key_dec_mode = 0; | |
124 | int ret = 0, u; | |
125 | ||
126 | if (sta) | |
127 | mac_addr = &sta->addr[0]; | |
128 | ||
129 | switch (key->cipher) { | |
130 | case 0: | |
131 | for (u = 0 ; u < MAX_KEY_TABLE; u++) | |
132 | vnt_mac_disable_keyentry(priv, u); | |
133 | return ret; | |
134 | ||
135 | case WLAN_CIPHER_SUITE_WEP40: | |
136 | case WLAN_CIPHER_SUITE_WEP104: | |
137 | for (u = 0; u < MAX_KEY_TABLE; u++) | |
138 | vnt_mac_disable_keyentry(priv, u); | |
139 | ||
140 | vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY, | |
141 | KEY_CTL_WEP, true); | |
142 | ||
143 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
144 | ||
145 | return ret; | |
146 | case WLAN_CIPHER_SUITE_TKIP: | |
147 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
148 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
149 | ||
150 | key_dec_mode = KEY_CTL_TKIP; | |
151 | ||
152 | break; | |
153 | case WLAN_CIPHER_SUITE_CCMP: | |
f1945a15 | 154 | if (priv->local_id <= MAC_REVISION_A1) |
d1eb5003 MP |
155 | return -EINVAL; |
156 | ||
157 | key_dec_mode = KEY_CTL_CCMP; | |
158 | ||
159 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
160 | } | |
161 | ||
d1eb5003 MP |
162 | if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { |
163 | vnt_set_keymode(hw, mac_addr, key, VNT_KEY_PAIRWISE, | |
164 | key_dec_mode, true); | |
165 | } else { | |
166 | vnt_set_keymode(hw, mac_addr, key, VNT_KEY_DEFAULTKEY, | |
167 | key_dec_mode, true); | |
168 | ||
169 | vnt_set_keymode(hw, (u8 *)conf->bssid, key, | |
170 | VNT_KEY_GROUP_ADDRESS, key_dec_mode, true); | |
171 | } | |
172 | ||
173 | return 0; | |
174 | } |