/* arc4.h
 *
 * Copyright (C) 2006-2017 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL 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.
 *
 * wolfSSL 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 02110-1335, USA
 */


#ifndef WOLF_CRYPT_ARC4_H
# define WOLF_CRYPT_ARC4_H

# include "types.h"

# ifdef __cplusplus
extern "C" {
# endif

# ifdef WOLFSSL_ASYNC_CRYPT
#  include "async.h"
# endif

enum {
    ARC4_ENC_TYPE   = 4, /* cipher unique type */
    ARC4_STATE_SIZE = 256
};

/* ARC4 encryption and decryption */
typedef struct Arc4 {
    byte         x;
    byte         y;
    byte         state[ARC4_STATE_SIZE];
    # ifdef WOLFSSL_ASYNC_CRYPT
    WC_ASYNC_DEV asyncDev;
    # endif
    void *       heap;
} Arc4;

WOLFSSL_API int wc_Arc4Process(Arc4 *, byte *, const byte *, word32);
WOLFSSL_API int wc_Arc4SetKey(Arc4 *, const byte *, word32);

WOLFSSL_API int
wc_Arc4Init(Arc4 *, void *, int);
WOLFSSL_API void
wc_Arc4Free(Arc4 *);

# ifdef __cplusplus
} /* extern "C" */
# endif


#endif /* WOLF_CRYPT_ARC4_H */
