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// ****************************************************************************
// Project: GUYMAGER
// ****************************************************************************
// Programmer: Guy Voncken
// Police Grand-Ducale
// Service de Police Judiciaire
// Section Nouvelles Technologies
// ****************************************************************************
// Module: SHA256 calculation
// ****************************************************************************
// Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
// 2018, 2019, 2020
// Guy Voncken
//
// This file is part of Guymager.
//
// Guymager 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.
//
// Guymager 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 Guymager. If not, see <http://www.gnu.org/licenses/>.
// See also header in sha256.cpp.
#ifndef SHA256_H
#define SHA256_H
typedef unsigned int uint32;
typedef unsigned char uint8;
#define SHA256_DIGEST_SIZE 32
#ifdef SHA256_OLD
typedef struct
{
uint32 total[2];
uint32 state[8];
uint8 buffer[64];
} t_SHA256Context, *t_pSHA256Context;
void SHA256Init (t_pSHA256Context pContext);
void SHA256Append (t_pSHA256Context pContext, uint8 *input, uint32 length );
void SHA256Finish (t_pSHA256Context pContext, uint8 digest[32] );
#else
typedef struct
{
uint32 state[8];
uint32 total[2];
size_t buflen;
uint32 buffer[32];
} t_SHA256Context, *t_pSHA256Context;
// Always make sure that these functions are compiled with O3 optimisation or
// else, performance is about 5 times worse! See also SHA256ProcessBlock in sha256.cpp.
// void SHA256Init (t_pSHA256Context pContext) __attribute__((optimize("-O3")));
// void SHA256Append (t_pSHA256Context pContext, const void *buffer, size_t len) __attribute__((optimize("-O3")));
// void SHA256Finish (t_pSHA256Context pContext, void *pDigest) __attribute__((optimize("-O3")));
void SHA256Init (t_pSHA256Context pContext);
void SHA256Append (t_pSHA256Context pContext, const void *buffer, size_t len);
void SHA256Finish (t_pSHA256Context pContext, void *pDigest);
#endif
#endif
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