| |
| /******************************************************************************* |
| * 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; |
| |
| } |
| /*============================================================================*/ |
| |