diff options
Diffstat (limited to 'drivers/staging/vt6656/rc4.c')
-rw-r--r-- | drivers/staging/vt6656/rc4.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/drivers/staging/vt6656/rc4.c b/drivers/staging/vt6656/rc4.c deleted file mode 100644 index 2fd836f07536..000000000000 --- a/drivers/staging/vt6656/rc4.c +++ /dev/null @@ -1,87 +0,0 @@ -/* - * 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: rc4.c - * - * Purpose: - * - * Functions: - * - * Revision History: - * - * Author: Kyle Hsu - * - * Date: Sep 4, 2002 - * - */ - -#include "rc4.h" - -void rc4_init(PRC4Ext pRC4, u8 * pbyKey, unsigned int cbKey_len) -{ - unsigned int ust1, ust2; - unsigned int keyindex; - unsigned int stateindex; - u8 * pbyst; - unsigned int idx; - - pbyst = pRC4->abystate; - pRC4->ux = 0; - pRC4->uy = 0; - for (idx = 0; idx < 256; idx++) - pbyst[idx] = (u8)idx; - keyindex = 0; - stateindex = 0; - for (idx = 0; idx < 256; idx++) { - ust1 = pbyst[idx]; - stateindex = (stateindex + pbyKey[keyindex] + ust1) & 0xff; - ust2 = pbyst[stateindex]; - pbyst[stateindex] = (u8)ust1; - pbyst[idx] = (u8)ust2; - if (++keyindex >= cbKey_len) - keyindex = 0; - } -} - -unsigned int rc4_byte(PRC4Ext pRC4) -{ - unsigned int ux; - unsigned int uy; - unsigned int ustx, usty; - u8 * pbyst; - - pbyst = pRC4->abystate; - ux = (pRC4->ux + 1) & 0xff; - ustx = pbyst[ux]; - uy = (ustx + pRC4->uy) & 0xff; - usty = pbyst[uy]; - pRC4->ux = ux; - pRC4->uy = uy; - pbyst[uy] = (u8)ustx; - pbyst[ux] = (u8)usty; - - return pbyst[(ustx + usty) & 0xff]; -} - -void rc4_encrypt(PRC4Ext pRC4, u8 * pbyDest, - u8 * pbySrc, unsigned int cbData_len) -{ - unsigned int ii; - for (ii = 0; ii < cbData_len; ii++) - pbyDest[ii] = (u8)(pbySrc[ii] ^ rc4_byte(pRC4)); -} |