/* hc128.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_HC128_H
# define WOLF_CRYPT_HC128_H

# include <wolfssl/wolfcrypt/types.h>

# ifndef NO_HC128

#  ifdef __cplusplus
extern "C" {
#  endif

enum {
    HC128_ENC_TYPE = 6 /* cipher unique type */
};

/* HC-128 stream cipher */
typedef struct HC128 {
    word32 T[1024]; /* P[i] = T[i];  Q[i] = T[1024 + i ]; */
    word32 X[16];
    word32 Y[16];
    word32 counter1024; /* counter1024 = i mod 1024 at the ith step */
    word32 key[8];
    word32 iv[8];
    #  ifdef XSTREAM_ALIGN
    void * heap; /* heap hint, currently XMALLOC only used with aligning */
    #  endif
} HC128;


WOLFSSL_API int wc_Hc128_Process(HC128 *, byte *, const byte *, word32);
WOLFSSL_API int
wc_Hc128_SetKey(HC128 *, const byte * key, const byte * iv);

WOLFSSL_LOCAL int
wc_Hc128_SetHeap(HC128 * ctx, void * heap);

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

# endif /* HAVE_HC128 */
#endif  /* WOLF_CRYPT_HC128_H */
