2 /*******************************************************************************
4 * Wireless device driver for Linux (wlags49).
6 * Copyright (c) 1998-2003 Agere Systems Inc.
10 * Initially developed by TriplePoint, Inc.
11 * http://www.triplepoint.com
13 *------------------------------------------------------------------------------
15 * This file defines functions related to WEP key coding/decoding.
17 *------------------------------------------------------------------------------
21 * This software is provided subject to the following terms and conditions,
22 * which you should read carefully before using the software. Using this
23 * software indicates your acceptance of these terms and conditions. If you do
24 * not agree with these terms and conditions, do not use the software.
26 * Copyright © 2003 Agere Systems Inc.
27 * All rights reserved.
29 * Redistribution and use in source or binary forms, with or without
30 * modifications, are permitted provided that the following conditions are met:
32 * . Redistributions of source code must retain the above copyright notice, this
33 * list of conditions and the following Disclaimer as comments in the code as
34 * well as in the documentation and/or other materials provided with the
37 * . Redistributions in binary form must reproduce the above copyright notice,
38 * this list of conditions and the following Disclaimer in the documentation
39 * and/or other materials provided with the distribution.
41 * . Neither the name of Agere Systems Inc. nor the names of the contributors
42 * may be used to endorse or promote products derived from this software
43 * without specific prior written permission.
47 * THIS SOFTWARE IS PROVIDED
\93AS IS
\94 AND ANY EXPRESS OR IMPLIED WARRANTIES,
48 * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
49 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
50 * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
51 * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
52 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
53 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
54 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
55 * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
57 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
60 ******************************************************************************/
62 /*******************************************************************************
64 ******************************************************************************/
65 #include <linux/string.h>
66 #include <wl_version.h>
73 /*******************************************************************************
75 *******************************************************************************
79 * This function encodes a set of wep keys for privacy
92 ******************************************************************************/
93 int wl_wep_code(char *szCrypt, char *szDest, void *Data, int nLen)
99 char *szData = (char *) Data;
100 /*------------------------------------------------------------------------*/
103 for (i = bits = 0; i < MACADDRESS_STR_LEN; i++) {
108 for (i = t = *szDest = 0; i < nLen; i++, t++) {
109 k = szData[i] ^ (bits + i);
116 szDest[t] = ((k & 0xFC) >> 2) + CH_START ;
117 szDest[t+1] = ((k & 0x03) << 4) + CH_START ;
125 szDest[t] += ((k & 0xF0) >> 4);
126 szDest[t+1] = ((k & 0x0F) << 2) + CH_START ;
134 szDest[t] += ((k & 0xC0) >> 6);
135 szDest[t+1] = (k & 0x3F) + CH_START ;
143 return strlen(szDest);
146 /*============================================================================*/
151 /*******************************************************************************
153 *******************************************************************************
157 * This function decodes a set of WEP keys for use by the card.
169 ******************************************************************************/
170 int wl_wep_decode(char *szCrypt, void *Dest, char *szData)
177 /*------------------------------------------------------------------------*/
180 for (i = bits = 0; i < 12; i++) {
185 nLen = (strlen(szData) * 3) / 4 ;
187 for (i = t = 0; i < nLen; i++, t++) {
191 szDest[i] = (((szData[t] - CH_START) & 0x3f) << 2) +
192 (((szData[t+1] - CH_START) & 0x30) >> 4);
197 szDest[i] = (((szData[t] - CH_START) & 0x0f) << 4) +
198 (((szData[t+1] - CH_START) & 0x3c) >> 2);
203 szDest[i] = (((szData[t] - CH_START) & 0x03) << 6) +
204 ((szData[t+1] - CH_START) & 0x3f);
209 szDest[i] ^= (bits + i);
216 /*============================================================================*/