text: /*
   *  Copyright (C) 2017 - This file is part of libecc project
   *
   *  Authors:
   *      Ryad BENADJILA <ryadbenadjila@gmail.com>
   *      Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr>
   *      Jean-Pierre FLORI <jean-pierre.flori@ssi.gouv.fr>
   *
   *  Contributors:
   *      Nicolas VIVET <nicolas.vivet@ssi.gouv.fr>
   *      Karim KHALFALLAH <karim.khalfallah@ssi.gouv.fr>
   *
   *  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_SHA224
  
  #ifndef __SHA224_H__
  #define __SHA224_H__
  
  #include "../words/words.h"
  #include "../utils/utils.h"
  #include "sha2.h"
  
  #define SHA224_STATE_SIZE   8
  #define SHA224_BLOCK_SIZE   64
  #define SHA224_DIGEST_SIZE  28
  
  /* Compute max hash digest and block sizes */
  #ifndef MAX_DIGEST_SIZE
  #define MAX_DIGEST_SIZE 0
  #endif
  #if (MAX_DIGEST_SIZE < SHA224_DIGEST_SIZE)
  #undef MAX_DIGEST_SIZE
  #define MAX_DIGEST_SIZE SHA224_DIGEST_SIZE
  #endif
  
  #ifndef MAX_BLOCK_SIZE
  #define MAX_BLOCK_SIZE  0
  #endif
  #if (MAX_BLOCK_SIZE < SHA224_BLOCK_SIZE)
  #undef MAX_BLOCK_SIZE
  #define MAX_BLOCK_SIZE SHA224_BLOCK_SIZE
  #endif
  
  #define SHA224_HASH_MAGIC ((word_t)(0x1120323b32342910ULL))
  #define SHA224_HASH_CHECK_INITIALIZED(A) \
          MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == SHA224_HASH_MAGIC))
  
  typedef struct {
  	/* Number of bytes processed */
  	u64 sha224_total;
  	/* Internal state */
  	u32 sha224_state[SHA224_STATE_SIZE];
  	/* Internal buffer to handle updates in a block */
  	u8 sha224_buffer[SHA224_BLOCK_SIZE];
          /* Initialization magic value */
          word_t magic;
  } sha224_context;
  
  void sha224_init(sha224_context *ctx);
  void sha224_update(sha224_context *ctx, const u8 *input, u32 ilen);
  void sha224_final(sha224_context *ctx, u8 output[SHA224_DIGEST_SIZE]);
  void sha224_scattered(const u8 **inputs, const u32 *ilens,
  		      u8 output[SHA224_DIGEST_SIZE]);
  void sha224(const u8 *input, u32 ilen, u8 output[SHA224_DIGEST_SIZE]);
  
  #endif /* __SHA224_H__ */
  #endif /* WITH_HASH_SHA224 */
  