sha256.h

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/*
     This file is part of libmicrohttpd
     Copyright (C) 2019-2022 Evgeny Grin (Karlson2k)
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
 
     This library 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
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.
     If not, see <http://www.gnu.org/licenses/>.
*/

 
#ifndef MHD_SHA256_H
#define MHD_SHA256_H 1
 
#include "mhd_options.h"
#include <stdint.h>
#ifdef HAVE_STDDEF_H
#include <stddef.h>  /* for size_t */
#endif /* HAVE_STDDEF_H */
 

#define SHA256_DIGEST_SIZE_WORDS 8

#define SHA256_WORD_SIZE_BITS 32

#define SHA256_BYTES_IN_WORD (SHA256_WORD_SIZE_BITS / 8)

#define SHA256_DIGEST_SIZE (SHA256_DIGEST_SIZE_WORDS * SHA256_BYTES_IN_WORD)

#define SHA256_DIGEST_STRING_SIZE ((SHA256_DIGEST_SIZE) * 2 + 1)

#define SHA256_BLOCK_SIZE_BITS 512

#define SHA256_BLOCK_SIZE (SHA256_BLOCK_SIZE_BITS / 8)

#define SHA256_BLOCK_SIZE_WORDS (SHA256_BLOCK_SIZE_BITS / SHA256_WORD_SIZE_BITS)
 
 
struct Sha256Ctx
{
  uint32_t H[SHA256_DIGEST_SIZE_WORDS];     
  uint32_t buffer[SHA256_BLOCK_SIZE_WORDS]; 
  uint64_t count;                           
};

void
MHD_SHA256_init (struct Sha256Ctx *ctx);
 

void
MHD_SHA256_update (struct Sha256Ctx *ctx,
                   const uint8_t *data,
                   size_t length);
 

void
MHD_SHA256_finish (struct Sha256Ctx *ctx,
                   uint8_t digest[SHA256_DIGEST_SIZE]);

#define MHD_SHA256_HAS_FINISH 1
 
#endif /* MHD_SHA256_H */