/* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
/* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */

/* sha256.h
 *
 * Copyright (C) 2006-2014 wolfSSL Inc.
 *
 * This file is part of CyaSSL.
 *
 * CyaSSL 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.
 *
 * CyaSSL 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 02110-1301, USA
 */

#ifndef CTAO_CRYPT_SHA256_H
#define CTAO_CRYPT_SHA256_H

#include "crypto/wolfssl/integer.h"

/* in bytes */
enum {
    SHA256_BLOCK_SIZE   = 64,
    SHA256_DIGEST_SIZE  = 32,
    SHA256_PAD_SIZE     = 56
};

/* SHA256 digest */
typedef struct SHA256 {
    word32  buffLen;   /* in bytes          */
    word32  loLen;     /* length in bytes   */
    word32  hiLen;     /* length in bytes   */
    word32  digest[SHA256_DIGEST_SIZE / sizeof(word32)];
    word32  buffer[SHA256_BLOCK_SIZE  / sizeof(word32)];
} SHA256;

int SHA256Init(SHA256 *);
int SHA256Update(SHA256 *, const byte *, word32);
int SHA256Final(SHA256 *, byte *);
int SHA256Hash(const byte *, word32, byte *);

#endif /* CTAO_CRYPT_SHA256_H */