arc4.h

00001 /* arc4.h
00002  *
00003  * Copyright (C) 2006-2009 Sawtooth Consulting Ltd.
00004  *
00005  * This file is part of CyaSSL.
00006  *
00007  * CyaSSL is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * CyaSSL is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
00020  */
00021 
00022 
00023 #ifndef CTAO_CRYPT_ARC4_H
00024 #define CTAO_CRYPT_ARC4_H
00025 
00026 
00027 #include "types.h"
00028 
00029 
00030 #ifdef __cplusplus
00031     extern "C" {
00032 #endif
00033 
00034 
00035 enum {
00036     ARC4_STATE_SIZE = 256
00037 };
00038 
00039 /* ARC4 encryption and decryption */
00040 typedef struct Arc4 {
00041     byte x;
00042     byte y;
00043     byte state[ARC4_STATE_SIZE];
00044 } Arc4;
00045 
00046 void Arc4Process(Arc4*, byte*, const byte*, word32);
00047 void Arc4SetKey(Arc4*, const byte*, word32);
00048 
00049 
00050 #ifdef __cplusplus
00051     } /* extern "C" */
00052 #endif
00053 
00054 
00055 #endif /* CTAO_CRYPT_ARC4_H */
00056