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/* arcfour.h
*
* The arcfour/rc4 stream cipher.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001 Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#ifndef NETTLE_ARCFOUR_H_INCLUDED
#define NETTLE_ARCFOUR_H_INCLUDED
#include "nettle-types.h"
/* Name mangling */
#define arcfour_set_key nettle_arcfour_set_key
#define arcfour_crypt nettle_arcfour_crypt
#define arcfour_stream nettle_arcfour_stream
/* Minimum and maximum keysizes, and a reasonable default. In
* octets.*/
#define ARCFOUR_MIN_KEY_SIZE 1
#define ARCFOUR_MAX_KEY_SIZE 256
#define ARCFOUR_KEY_SIZE 16
struct arcfour_ctx
{
uint8_t S[256];
uint8_t i;
uint8_t j;
};
void
arcfour_set_key(struct arcfour_ctx *ctx,
unsigned length, const uint8_t *key);
void
arcfour_crypt(struct arcfour_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
void
arcfour_stream(struct arcfour_ctx *ctx,
unsigned length, uint8_t *dst);
#endif /* NETTLE_ARCFOUR_H_INCLUDED */
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