text: /*
   *  Copyright (C) 2021 - This file is part of libecc project
   *
   *  Authors:
   *      Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr>
   *      Ryad BENADJILA <ryadbenadjila@gmail.com>
   *
   *  This software is licensed under a dual BSD and GPL v2 license.
   *  See LICENSE file at the root folder of the project.
   */
  #include "../lib_ecc_config.h"
  #ifdef WITH_HASH_SM3
  
  #ifndef __SM3_H__
  #define __SM3_H__
  
  #include "../words/words.h"
  #include "../utils/utils.h"
  
  #define SM3_STATE_SIZE    8 /* in 32 bits word */
  #define SM3_BLOCK_SIZE   64
  #define SM3_DIGEST_SIZE  32
  
  /* Compute max hash digest and block sizes */
  #ifndef MAX_DIGEST_SIZE
  #define MAX_DIGEST_SIZE	0
  #endif
  #if (MAX_DIGEST_SIZE < SM3_DIGEST_SIZE)
  #undef MAX_DIGEST_SIZE
  #define MAX_DIGEST_SIZE SM3_DIGEST_SIZE
  #endif
  
  #ifndef MAX_BLOCK_SIZE
  #define MAX_BLOCK_SIZE  0
  #endif
  #if (MAX_BLOCK_SIZE < SM3_BLOCK_SIZE)
  #undef MAX_BLOCK_SIZE
  #define MAX_BLOCK_SIZE SM3_BLOCK_SIZE
  #endif
  
  #define SM3_HASH_MAGIC ((word_t)(0x2947510312849204ULL))
  #define SM3_HASH_CHECK_INITIALIZED(A) \
          MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == SM3_HASH_MAGIC))
  
  typedef struct {
  	/* Number of bytes processed */
  	u64 sm3_total;
  	/* Internal state */
  	u32 sm3_state[SM3_STATE_SIZE];
  	/* Internal buffer to handle updates in a block */
  	u8 sm3_buffer[SM3_BLOCK_SIZE];
          /* Initialization magic value */
          word_t magic;
  } sm3_context;
  
  void sm3_init(sm3_context *ctx);
  void sm3_update(sm3_context *ctx, const u8 *input, u32 ilen);
  void sm3_final(sm3_context *ctx, u8 output[SM3_DIGEST_SIZE]);
  void sm3_scattered(const u8 **inputs, const u32 *ilens,
  		   u8 output[SM3_DIGEST_SIZE]);
  void sm3(const u8 *input, u32 ilen, u8 output[SM3_DIGEST_SIZE]);
  
  #endif /* __SM3_H__ */
  #endif /* WITH_HASH_SM3 */
  