/* sha256.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
 */


/* code submitted by raphael.huck@efixo.com */

#ifndef WOLF_CRYPT_SHA256_H
# define WOLF_CRYPT_SHA256_H

# include "types.h"

# ifndef NO_SHA256

#  ifdef HAVE_FIPS
#   define wc_Sha256             Sha256
#   define WC_SHA256             SHA256
#   define WC_SHA256_BLOCK_SIZE  SHA256_BLOCK_SIZE
#   define WC_SHA256_DIGEST_SIZE SHA256_DIGEST_SIZE
#   define WC_SHA256_PAD_SIZE    SHA256_PAD_SIZE

#   ifdef WOLFSSL_SHA224
#    define wc_Sha224             Sha224
#    define WC_SHA224             SHA224
#    define WC_SHA224_BLOCK_SIZE  SHA224_BLOCK_SIZE
#    define WC_SHA224_DIGEST_SIZE SHA224_DIGEST_SIZE
#    define WC_SHA224_PAD_SIZE    SHA224_PAD_SIZE
#   endif

/* for fips @wc_fips */
#   include <cyassl/ctaocrypt/sha256.h>
#  endif // ifdef HAVE_FIPS

#  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 redefinition of structs */

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

#   if defined(_MSC_VER)
#    define SHA256_NOINLINE __declspec(noinline)
#   elif defined(__GNUC__)
#    define SHA256_NOINLINE __attribute__((noinline))
#   else
#    define SHA256_NOINLINE
#   endif

#   ifndef NO_OLD_WC_NAMES
#    define Sha256             wc_Sha256
#    define SHA256             WC_SHA256
#    define SHA256_BLOCK_SIZE  WC_SHA256_BLOCK_SIZE
#    define SHA256_DIGEST_SIZE WC_SHA256_DIGEST_SIZE
#    define SHA256_PAD_SIZE    WC_SHA256_PAD_SIZE
#   endif

/* in bytes */
enum {
    WC_SHA256             = 2, /* hash type unique */
    WC_SHA256_BLOCK_SIZE  = 64,
    WC_SHA256_DIGEST_SIZE = 32,
    WC_SHA256_PAD_SIZE    = 56
};

#   ifndef WOLFSSL_TI_HASH

/* wc_Sha256 digest */
typedef struct wc_Sha256 {
    #    ifdef FREESCALE_LTC_SHA
    ltc_hash_ctx_t     ctx;
    #    else
    /* alignment on digest and buffer speeds up ARMv8 crypto operations */
    ALIGN16 word32     digest[WC_SHA256_DIGEST_SIZE / sizeof(word32)];
    ALIGN16 word32     buffer[WC_SHA256_BLOCK_SIZE / sizeof(word32)];
    word32             buffLen; /* in bytes          */
    word32             loLen;   /* length in bytes   */
    word32             hiLen;   /* length in bytes   */
    void *             heap;
    #     ifdef USE_INTEL_SPEEDUP
    const byte *       data;
    #     endif
    #     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_Sha256;

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

#  endif /* HAVE_FIPS */

WOLFSSL_API int
wc_InitSha256(wc_Sha256 *);
WOLFSSL_API int
wc_InitSha256_ex(wc_Sha256 *, void *, int);
WOLFSSL_API int wc_Sha256Update(wc_Sha256 *, const byte *, word32);
WOLFSSL_API int
wc_Sha256Final(wc_Sha256 *, byte *);
WOLFSSL_API void
wc_Sha256Free(wc_Sha256 *);

WOLFSSL_API int
wc_Sha256GetHash(wc_Sha256 *, byte *);
WOLFSSL_API int
wc_Sha256Copy(wc_Sha256 * src, wc_Sha256 * dst);

#  ifdef WOLFSSL_PIC32MZ_HASH
WOLFSSL_API void wc_Sha256SizeSet(wc_Sha256 *, word32);
#  endif

#  ifdef WOLFSSL_SHA224
#   ifndef HAVE_FIPS /* avoid redefinition of structs */

#    ifndef NO_OLD_WC_NAMES
#     define Sha224             wc_Sha224
#     define SHA224             WC_SHA224
#     define SHA224_BLOCK_SIZE  WC_SHA224_BLOCK_SIZE
#     define SHA224_DIGEST_SIZE WC_SHA224_DIGEST_SIZE
#     define SHA224_PAD_SIZE    WC_SHA224_PAD_SIZE
#    endif

/* in bytes */
enum {
    WC_SHA224             = 8, /* hash type unique */
    WC_SHA224_BLOCK_SIZE  = WC_SHA256_BLOCK_SIZE,
    WC_SHA224_DIGEST_SIZE = 28,
    WC_SHA224_PAD_SIZE    = WC_SHA256_PAD_SIZE
};

typedef wc_Sha256 wc_Sha224;
#   endif /* HAVE_FIPS */

WOLFSSL_API int
wc_InitSha224(wc_Sha224 *);
WOLFSSL_API int
wc_InitSha224_ex(wc_Sha224 *, void *, int);
WOLFSSL_API int wc_Sha224Update(wc_Sha224 *, const byte *, word32);
WOLFSSL_API int
wc_Sha224Final(wc_Sha224 *, byte *);
WOLFSSL_API void
wc_Sha224Free(wc_Sha224 *);

WOLFSSL_API int
wc_Sha224GetHash(wc_Sha224 *, byte *);
WOLFSSL_API int
wc_Sha224Copy(wc_Sha224 * src, wc_Sha224 * dst);

#  endif /* WOLFSSL_SHA224 */

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

# endif /* NO_SHA256 */
#endif  /* WOLF_CRYPT_SHA256_H */
