/* sha.h
 *
 * Copyright (C) 2006-2016 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 <wolfssl/wolfcrypt/types.h>

#ifndef NO_SHA

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

#ifdef FREESCALE_LTC_SHA
    #include "fsl_ltc.h"
#endif

#ifdef __cplusplus
    extern "C" {
#endif

#ifndef HAVE_FIPS /* avoid redefining structs */

#ifdef WOLFSSL_PIC32MZ_HASH
    #include "port/pic32/pic32mz-crypt.h"
#endif
#ifdef WOLFSSL_ASYNC_CRYPT
    #include <wolfssl/wolfcrypt/async.h>
#endif

/* in bytes */
enum {
#if defined(STM32F2_HASH) || defined(STM32F4_HASH)
    SHA_REG_SIZE     =  4,    /* STM32 register size, bytes */
#endif
    SHA              =  1,    /* hash type unique */
    SHA_BLOCK_SIZE   = 64,
    SHA_DIGEST_SIZE  = 20,
    SHA_PAD_SIZE     = 56
};


#ifndef WOLFSSL_TI_HASH
/* Sha digest */
typedef struct 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[SHA_BLOCK_SIZE  / sizeof(word32)];
    #ifndef WOLFSSL_PIC32MZ_HASH
        word32  digest[SHA_DIGEST_SIZE / sizeof(word32)];
    #else
        word32  digest[PIC32_HASH_SIZE / sizeof(word32)];
    #endif
        void*   heap;
    #ifdef WOLFSSL_PIC32MZ_HASH
        pic32mz_desc desc; /* Crypt Engine descriptor */
    #endif
    #ifdef WOLFSSL_ASYNC_CRYPT
        WC_ASYNC_DEV asyncDev;
    #endif /* WOLFSSL_ASYNC_CRYPT */
#endif /* FREESCALE_LTC_SHA */
} Sha;

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


#endif /* HAVE_FIPS */

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

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

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

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


