1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*
* File: wpa2.c
*
* Purpose: Handles the Basic Service Set & Node Database functions
*
* Functions:
*
* Revision History:
*
* Author: Yiching Chen
*
* Date: Oct. 4, 2004
*
*/
#include "device.h"
#include "wpa2.h"
static int msglevel =MSG_LEVEL_INFO;
//static int msglevel =MSG_LEVEL_DEBUG;
static const u8 abyOUIGK[4] = { 0x00, 0x0F, 0xAC, 0x00 };
static const u8 abyOUIWEP40[4] = { 0x00, 0x0F, 0xAC, 0x01 };
static const u8 abyOUIWEP104[4] = { 0x00, 0x0F, 0xAC, 0x05 };
static const u8 abyOUITKIP[4] = { 0x00, 0x0F, 0xAC, 0x02 };
static const u8 abyOUICCMP[4] = { 0x00, 0x0F, 0xAC, 0x04 };
static const u8 abyOUI8021X[4] = { 0x00, 0x0F, 0xAC, 0x01 };
static const u8 abyOUIPSK[4] = { 0x00, 0x0F, 0xAC, 0x02 };
/*+
*
* Description:
* Clear RSN information in BSSList.
*
* Parameters:
* In:
* pBSSNode - BSS list.
* Out:
* none
*
* Return Value: none.
*
-*/
void
WPA2_ClearRSN (
PKnownBSS pBSSNode
)
{
int ii;
pBSSNode->bWPA2Valid = false;
pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
for (ii=0; ii < 4; ii ++)
pBSSNode->abyCSSPK[ii] = WLAN_11i_CSS_CCMP;
pBSSNode->wCSSPKCount = 1;
for (ii=0; ii < 4; ii ++)
pBSSNode->abyAKMSSAuthType[ii] = WLAN_11i_AKMSS_802_1X;
pBSSNode->wAKMSSAuthCount = 1;
pBSSNode->sRSNCapObj.bRSNCapExist = false;
pBSSNode->sRSNCapObj.wRSNCap = 0;
}
/*+
*
* Description:
* Parse RSN IE.
*
* Parameters:
* In:
* pBSSNode - BSS list.
* pRSN - Pointer to the RSN IE.
* Out:
* none
*
* Return Value: none.
*
-*/
void
WPA2vParseRSN (
PKnownBSS pBSSNode,
PWLAN_IE_RSN pRSN
)
{
int i, j;
u16 m = 0, n = 0;
u8 * pbyOUI;
bool bUseGK = false;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA2_ParseRSN: [%d]\n", pRSN->len);
WPA2_ClearRSN(pBSSNode);
if (pRSN->len == 2) { // ver(2)
if ((pRSN->byElementID == WLAN_EID_RSN) && (pRSN->wVersion == 1)) {
pBSSNode->bWPA2Valid = true;
}
return;
}
if (pRSN->len < 6) { // ver(2) + GK(4)
// invalid CSS, P802.11i/D10.0, p31
return;
}
// information element header makes sense
if ((pRSN->byElementID == WLAN_EID_RSN) &&
(pRSN->wVersion == 1)) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal 802.11i RSN\n");
pbyOUI = &(pRSN->abyRSN[0]);
if ( !memcmp(pbyOUI, abyOUIWEP40, 4))
pBSSNode->byCSSGK = WLAN_11i_CSS_WEP40;
else if ( !memcmp(pbyOUI, abyOUITKIP, 4))
pBSSNode->byCSSGK = WLAN_11i_CSS_TKIP;
else if ( !memcmp(pbyOUI, abyOUICCMP, 4))
pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
else if ( !memcmp(pbyOUI, abyOUIWEP104, 4))
pBSSNode->byCSSGK = WLAN_11i_CSS_WEP104;
else if ( !memcmp(pbyOUI, abyOUIGK, 4)) {
// invalid CSS, P802.11i/D10.0, p32
return;
} else
// any vendor checks here
pBSSNode->byCSSGK = WLAN_11i_CSS_UNKNOWN;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"802.11i CSS: %X\n", pBSSNode->byCSSGK);
if (pRSN->len == 6) {
pBSSNode->bWPA2Valid = true;
return;
}
if (pRSN->len >= 8) { // ver(2) + GK(4) + PK count(2)
pBSSNode->wCSSPKCount = *((u16 *) &(pRSN->abyRSN[4]));
j = 0;
pbyOUI = &(pRSN->abyRSN[6]);
for (i = 0; (i < pBSSNode->wCSSPKCount) && (j < sizeof(pBSSNode->abyCSSPK)/sizeof(u8)); i++) {
if (pRSN->len >= 8+i*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*i)
if ( !memcmp(pbyOUI, abyOUIGK, 4)) {
pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_USE_GROUP;
bUseGK = true;
} else if ( !memcmp(pbyOUI, abyOUIWEP40, 4)) {
// Invalid CSS, continue parsing
} else if ( !memcmp(pbyOUI, abyOUITKIP, 4)) {
if (pBSSNode->byCSSGK != WLAN_11i_CSS_CCMP)
pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_TKIP;
else
; // Invalid CSS, continue parsing
} else if ( !memcmp(pbyOUI, abyOUICCMP, 4)) {
pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_CCMP;
} else if ( !memcmp(pbyOUI, abyOUIWEP104, 4)) {
// Invalid CSS, continue parsing
} else {
// any vendor checks here
pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_UNKNOWN;
}
pbyOUI += 4;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyCSSPK[%d]: %X\n", j-1, pBSSNode->abyCSSPK[j-1]);
} else
break;
} //for
if (bUseGK == true) {
if (j != 1) {
// invalid CSS, This should be only PK CSS.
return;
}
if (pBSSNode->byCSSGK == WLAN_11i_CSS_CCMP) {
// invalid CSS, If CCMP is enable , PK can't be CSSGK.
return;
}
}
if ((pBSSNode->wCSSPKCount != 0) && (j == 0)) {
// invalid CSS, No valid PK.
return;
}
pBSSNode->wCSSPKCount = (u16)j;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wCSSPKCount: %d\n", pBSSNode->wCSSPKCount);
}
m = *((u16 *) &(pRSN->abyRSN[4]));
if (pRSN->len >= 10+m*4) { // ver(2) + GK(4) + PK count(2) + PKS(4*m) + AKMSS count(2)
pBSSNode->wAKMSSAuthCount = *((u16 *) &(pRSN->abyRSN[6+4*m]));
j = 0;
pbyOUI = &(pRSN->abyRSN[8+4*m]);
for (i = 0; (i < pBSSNode->wAKMSSAuthCount) && (j < sizeof(pBSSNode->abyAKMSSAuthType)/sizeof(u8)); i++) {
if (pRSN->len >= 10+(m+i)*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSS(2)+AKS(4*i)
if ( !memcmp(pbyOUI, abyOUI8021X, 4))
pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_802_1X;
else if ( !memcmp(pbyOUI, abyOUIPSK, 4))
pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_PSK;
else
// any vendor checks here
pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_UNKNOWN;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyAKMSSAuthType[%d]: %X\n", j-1, pBSSNode->abyAKMSSAuthType[j-1]);
} else
break;
}
pBSSNode->wAKMSSAuthCount = (u16)j;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAKMSSAuthCount: %d\n", pBSSNode->wAKMSSAuthCount);
n = *((u16 *) &(pRSN->abyRSN[6+4*m]));
if (pRSN->len >= 12+4*m+4*n) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSSCnt(2)+AKMSS(4*n)+Cap(2)
pBSSNode->sRSNCapObj.bRSNCapExist = true;
pBSSNode->sRSNCapObj.wRSNCap = *((u16 *) &(pRSN->abyRSN[8+4*m+4*n]));
}
}
//ignore PMKID lists bcs only (Re)Assocrequest has this field
pBSSNode->bWPA2Valid = true;
}
}
|
