blob: 26cf5486edd61462028176c952afddf3e81f9b54 [file] [log] [blame]
/*******************************************************************************
* Agere Systems Inc.
* Wireless device driver for Linux (wlags49).
*
* Copyright (c) 1998-2003 Agere Systems Inc.
* All rights reserved.
* http://www.agere.com
*
* Initially developed by TriplePoint, Inc.
* http://www.triplepoint.com
*
*------------------------------------------------------------------------------
*
* This file defines functions related to WEP key coding/decoding.
*
*------------------------------------------------------------------------------
*
* SOFTWARE LICENSE
*
* This software is provided subject to the following terms and conditions,
* which you should read carefully before using the software. Using this
* software indicates your acceptance of these terms and conditions. If you do
* not agree with these terms and conditions, do not use the software.
*
* Copyright © 2003 Agere Systems Inc.
* All rights reserved.
*
* Redistribution and use in source or binary forms, with or without
* modifications, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following Disclaimer as comments in the code as
* well as in the documentation and/or other materials provided with the
* distribution.
*
* . Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following Disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* . Neither the name of Agere Systems Inc. nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* Disclaimer
*
* THIS SOFTWARE IS PROVIDED “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
* USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
* RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
******************************************************************************/
/*******************************************************************************
* include files
******************************************************************************/
#include <linux/string.h>
#include <wl_version.h>
#include <debug.h>
#include <hcf.h>
#include <wl_enc.h>
/*******************************************************************************
* global definitions
******************************************************************************/
#if DBG
extern dbg_info_t *DbgInfo;
#endif /* DBG */
/*******************************************************************************
* wl_wep_code()
*******************************************************************************
*
* DESCRIPTION:
*
* This function encodes a set of wep keys for privacy
*
* PARAMETERS:
*
* szCrypt -
* szDest -
* Data -
* nLen -
*
* RETURNS:
*
* OK
*
******************************************************************************/
int wl_wep_code( char *szCrypt, char *szDest, void *Data, int nLen )
{
int i;
int t;
int k ;
char bits;
char *szData = (char *) Data;
/*------------------------------------------------------------------------*/
for( i = bits = 0 ; i < MACADDRESS_STR_LEN; i++ ) {
bits ^= szCrypt[i];
bits += szCrypt[i];
}
for( i = t = *szDest = 0; i < nLen; i++, t++ ) {
k = szData[i] ^ ( bits + i );
switch( i % 3 ) {
case 0 :
szDest[t] = ((k & 0xFC) >> 2) + CH_START ;
szDest[t+1] = ((k & 0x03) << 4) + CH_START ;
szDest[t+2] = '\0';
break;
case 1 :
szDest[t] += (( k & 0xF0 ) >> 4 );
szDest[t+1] = (( k & 0x0F ) << 2 ) + CH_START ;
szDest[t+2] = '\0';
break;
case 2 :
szDest[t] += (( k & 0xC0 ) >> 6 );
szDest[t+1] = ( k & 0x3F ) + CH_START ;
szDest[t+2] = '\0';
t++;
break;
}
}
return( strlen( szDest )) ;
}
/*============================================================================*/
/*******************************************************************************
* wl_wep_decode()
*******************************************************************************
*
* DESCRIPTION:
*
* This function decodes a set of WEP keys for use by the card.
*
* PARAMETERS:
*
* szCrypt -
* szDest -
* Data -
*
* RETURNS:
*
* OK
*
******************************************************************************/
int wl_wep_decode( char *szCrypt, void *Dest, char *szData )
{
int i;
int t;
int nLen;
char bits;
char *szDest = Dest;
/*------------------------------------------------------------------------*/
for( i = bits = 0 ; i < 12; i++ ) {
bits ^= szCrypt[i] ;
bits += szCrypt[i] ;
}
nLen = ( strlen( szData ) * 3) / 4 ;
for( i = t = 0; i < nLen; i++, t++ ) {
switch( i % 3 ) {
case 0 :
szDest[i] = ((( szData[t]-CH_START ) & 0x3f ) << 2 ) +
((( szData[t+1]-CH_START ) & 0x30 ) >> 4 );
break;
case 1 :
szDest[i] = ((( szData[t]-CH_START ) & 0x0f ) << 4 ) +
((( szData[t+1]-CH_START ) & 0x3c ) >> 2 );
break;
case 2 :
szDest[i] = ((( szData[t]-CH_START ) & 0x03 ) << 6 ) +
(( szData[t+1]-CH_START ) & 0x3f );
t++;
break;
}
szDest[i] ^= ( bits + i ) ;
}
return( i ) ;
}
/*============================================================================*/