/* sha.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_SHA_H
# define WOLF_CRYPT_SHA_H

# include "types.h"

# ifndef NO_SHA

#  ifdef HAVE_FIPS
#   define wc_Sha             Sha
#   define WC_SHA             SHA
#   define WC_SHA_BLOCK_SIZE  SHA_BLOCK_SIZE
#   define WC_SHA_DIGEST_SIZE SHA_DIGEST_SIZE
#   define WC_SHA_PAD_SIZE    SHA_PAD_SIZE

/* for fips @wc_fips */
#   include <cyassl/ctaocrypt/sha.h>
#  endif

#  ifdef FREESCALE_LTC_SHA
/**================= Use KSDK 1.3 LTC Driver - Dec 29, 2016 =================**/
// #include "fsl_ltc.h"
#   include "fsl_ltc_driver.h"
/**==========================================================================**/
#  endif

#  ifdef __cplusplus
extern "C" {
#  endif

#  ifndef HAVE_FIPS /* avoid redefining structs */

#   ifdef WOLFSSL_MICROCHIP_PIC32MZ
#    include <wolfssl/wolfcrypt/port/pic32/pic32mz-crypt.h>
#   endif
#   ifdef WOLFSSL_ASYNC_CRYPT
#    include <wolfssl/wolfcrypt/async.h>
#   endif

#   ifndef NO_OLD_WC_NAMES
#    define Sha             wc_Sha
#    define SHA             WC_SHA
#    define SHA_BLOCK_SIZE  WC_SHA_BLOCK_SIZE
#    define SHA_DIGEST_SIZE WC_SHA_DIGEST_SIZE
#    define SHA_PAD_SIZE    WC_SHA_PAD_SIZE
#   endif

/* in bytes */
enum {
    WC_SHA             = 1, /* hash type unique */
    WC_SHA_BLOCK_SIZE  = 64,
    WC_SHA_DIGEST_SIZE = 20,
    WC_SHA_PAD_SIZE    = 56
};


#   ifndef WOLFSSL_TI_HASH
/* Sha digest */
typedef struct wc_Sha {
    #    ifdef FREESCALE_LTC_SHA
    ltc_hash_ctx_t     ctx;
    #    else
    word32             buffLen; /* in bytes          */
    word32             loLen;   /* length in bytes   */
    word32             hiLen;   /* length in bytes   */
    word32             buffer[WC_SHA_BLOCK_SIZE / sizeof(word32)];
    #     ifdef WOLFSSL_PIC32MZ_HASH
    word32             digest[PIC32_DIGEST_SIZE / sizeof(word32)];
    #     else
    word32             digest[WC_SHA_DIGEST_SIZE / sizeof(word32)];
    #     endif
    void *             heap;
    #     ifdef WOLFSSL_PIC32MZ_HASH
    hashUpdCache       cache; /* cache for updates */
    #     endif
    #     if defined(STM32_HASH) && defined(WOLFSSL_STM32_CUBEMX)
    HASH_HandleTypeDef hashHandle;
    #     endif
    #     ifdef WOLFSSL_ASYNC_CRYPT
    WC_ASYNC_DEV       asyncDev;
    #     endif /* WOLFSSL_ASYNC_CRYPT */
    #    endif  /* FREESCALE_LTC_SHA */
} wc_Sha;

#   else // ifndef WOLFSSL_TI_HASH
#    include "wolfssl/wolfcrypt/port/ti/ti-hash.h"
#   endif /* WOLFSSL_TI_HASH */


#  endif /* HAVE_FIPS */

WOLFSSL_API int
wc_InitSha(wc_Sha *);
WOLFSSL_API int
wc_InitSha_ex(wc_Sha * sha, void * heap, int devId);
WOLFSSL_API int wc_ShaUpdate(wc_Sha *, const byte *, word32);
WOLFSSL_API int
wc_ShaFinal(wc_Sha *, byte *);
WOLFSSL_API void
wc_ShaFree(wc_Sha *);

WOLFSSL_API int
wc_ShaGetHash(wc_Sha *, byte *);
WOLFSSL_API int
wc_ShaCopy(wc_Sha *, wc_Sha *);

#  ifdef WOLFSSL_PIC32MZ_HASH
WOLFSSL_API void
wc_ShaSizeSet(wc_Sha * sha, word32 len);
#  endif

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

# endif /* NO_SHA */
#endif  /* WOLF_CRYPT_SHA_H */
