/* hmac.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
 */


/*  hmac.h defines mini hamc openssl compatibility layer
 *
 */


#ifndef WOLFSSL_HMAC_H_
# define WOLFSSL_HMAC_H_

# include "../wolfcrypt/settings.h"

# ifdef WOLFSSL_PREFIX
#  include "prefix_hmac.h"
# endif

# include "evp.h"
# include "opensslv.h"
# include "../wolfcrypt/hmac.h"

# ifdef __cplusplus
extern "C" {
# endif


WOLFSSL_API unsigned char *
wolfSSL_HMAC(const WOLFSSL_EVP_MD * evp_md,
  const void * key, int key_len,
  const unsigned char * d, int n, unsigned char * md,
  unsigned int * md_len);


typedef struct WOLFSSL_HMAC_CTX {
    Hmac hmac;
    int  type;
} WOLFSSL_HMAC_CTX;

# ifdef WOLFSSL_SIGNAL
WOLFSSL_API int
wolfSSL_HMAC_CTX_init(WOLFSSL_HMAC_CTX * ctx);
WOLFSSL_API int
wolfSSL_HMAC_Init(WOLFSSL_HMAC_CTX * ctx, const void * key,
  int keylen, const EVP_MD * type);
WOLFSSL_API int
wolfSSL_HMAC_Init_ex(WOLFSSL_HMAC_CTX * ctx, const void * key,
  int len, const EVP_MD * md, void * impl);
WOLFSSL_API int
wolfSSL_HMAC_Update(WOLFSSL_HMAC_CTX * ctx,
  const unsigned char * data, int len);
WOLFSSL_API int
wolfSSL_HMAC_Final(WOLFSSL_HMAC_CTX * ctx, unsigned char * hash,
  unsigned int * len);
WOLFSSL_API int
wolfSSL_HMAC_cleanup(WOLFSSL_HMAC_CTX * ctx);
# else // ifdef WOLFSSL_SIGNAL
WOLFSSL_API void
wolfSSL_HMAC_CTX_init(WOLFSSL_HMAC_CTX * ctx);
WOLFSSL_API void
wolfSSL_HMAC_Init(WOLFSSL_HMAC_CTX * ctx, const void * key,
  int keylen, const EVP_MD * type);
WOLFSSL_API void
wolfSSL_HMAC_Init_ex(WOLFSSL_HMAC_CTX * ctx, const void * key,
  int len, const EVP_MD * md, void * impl);
WOLFSSL_API void
wolfSSL_HMAC_Update(WOLFSSL_HMAC_CTX * ctx,
  const unsigned char * data, int len);
WOLFSSL_API void
wolfSSL_HMAC_Final(WOLFSSL_HMAC_CTX * ctx, unsigned char * hash,
  unsigned int * len);
WOLFSSL_API void
wolfSSL_HMAC_cleanup(WOLFSSL_HMAC_CTX * ctx);
# endif // ifdef WOLFSSL_SIGNAL

typedef struct WOLFSSL_HMAC_CTX HMAC_CTX;

# define HMAC(a, b, c, d, e, f, g) wolfSSL_HMAC((a), (b), (c), (d), (e), (f), (g))

# define HMAC_CTX_init wolfSSL_HMAC_CTX_init
# define HMAC_Init     wolfSSL_HMAC_Init
# define HMAC_Init_ex  wolfSSL_HMAC_Init_ex
# define HMAC_Update   wolfSSL_HMAC_Update
# define HMAC_Final    wolfSSL_HMAC_Final
# define HMAC_cleanup  wolfSSL_HMAC_cleanup


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


#endif /* WOLFSSL_HMAC_H_ */
