text: /* 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
   */
  
  /*!
      \file wolfssl/wolfcrypt/sha.h
  */
  
  
  #ifndef WOLF_CRYPT_SHA_H
  #define WOLF_CRYPT_SHA_H
  
  #include <wolfssl/wolfcrypt/types.h>
  
  #ifndef NO_SHA
  
  #if defined(HAVE_FIPS) && \
      defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
      #include <wolfssl/wolfcrypt/fips.h>
  #endif /* HAVE_FIPS_VERSION >= 2 */
  
  #if defined(HAVE_FIPS) && \
  	(!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
  #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
      #include "fsl_ltc.h"
  #endif
  
  #ifdef __cplusplus
      extern "C" {
  #endif
  
  /* avoid redefinition of structs */
  #if !defined(HAVE_FIPS) || \
      (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))
  
  #ifdef WOLFSSL_MICROCHIP_PIC32MZ
      #include <wolfssl/wolfcrypt/port/pic32/pic32mz-crypt.h>
  #endif
  #ifdef STM32_HASH
      #include <wolfssl/wolfcrypt/port/st/stm32.h>
  #endif
  #ifdef WOLFSSL_ASYNC_CRYPT
      #include <wolfssl/wolfcrypt/async.h>
  #endif
  #ifdef WOLFSSL_ESP32WROOM32_CRYPT
      #include <wolfssl/wolfcrypt/port/Espressif/esp32-crypt.h>
  #endif
  
  #if !defined(NO_OLD_SHA_NAMES)
      #define SHA             WC_SHA
  #endif
  
  #ifndef NO_OLD_WC_NAMES
      #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              =  WC_HASH_TYPE_SHA,
      WC_SHA_BLOCK_SIZE   = 64,
      WC_SHA_DIGEST_SIZE  = 20,
      WC_SHA_PAD_SIZE     = 56
  };
  
  
  #if defined(WOLFSSL_TI_HASH)
      #include "wolfssl/wolfcrypt/port/ti/ti-hash.h"
  
  #elif defined(WOLFSSL_IMX6_CAAM)
      #include "wolfssl/wolfcrypt/port/caam/wolfcaam_sha.h"
  
  #else
  /* Sha digest */
  typedef struct wc_Sha {
  #ifdef FREESCALE_LTC_SHA
          ltc_hash_ctx_t ctx;
  #elif defined(STM32_HASH)
          STM32_HASH_Context stmCtx;
  #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
      #ifdef WOLFSSL_ASYNC_CRYPT
          WC_ASYNC_DEV asyncDev;
      #endif /* WOLFSSL_ASYNC_CRYPT */
      #ifdef WOLF_CRYPTO_CB
          int    devId;
          void*  devCtx; /* generic crypto callback context */
      #endif
  #endif
  #if defined(WOLFSSL_ESP32WROOM32_CRYPT) && \
     !defined(NO_WOLFSSL_ESP32WROOM32_CRYPT_HASH)
      WC_ESP32SHA ctx;
  #endif
  #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
      word32 flags; /* enum wc_HashFlags in hash.h */
  #endif
  } wc_Sha;
  
  #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_ShaFinalRaw(wc_Sha*, byte*);
  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
  
  #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
      WOLFSSL_LOCAL int wc_ShaSetFlags(wc_Sha* sha, word32 flags);
      WOLFSSL_LOCAL int wc_ShaGetFlags(wc_Sha* sha, word32* flags);
  #endif
  
  #ifdef __cplusplus
      } /* extern "C" */
  #endif
  
  #endif /* NO_SHA */
  #endif /* WOLF_CRYPT_SHA_H */
  
  