diff options
Diffstat (limited to 'drivers/staging/wlags49_h2/wl_enc.c')
| -rw-r--r-- | drivers/staging/wlags49_h2/wl_enc.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/staging/wlags49_h2/wl_enc.c b/drivers/staging/wlags49_h2/wl_enc.c new file mode 100644 index 000000000000..48c44c8fdb28 --- /dev/null +++ b/drivers/staging/wlags49_h2/wl_enc.c @@ -0,0 +1,231 @@ + +/******************************************************************************* + * 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 <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 ) ; + +} +/*============================================================================*/ + |