/* Copyright (C) 2013 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef SHA_INCLUDED
#define SHA_INCLUDED

#define SHA_DIGEST_SIZE 32

/**
 * Structure for performing SHA256 encryption on arbitrary data
 */
struct SHA256
{
	unsigned int total[2];
	unsigned int state[8];
	unsigned char buffer[64];
 
	SHA256();
	void init();
	void transform(unsigned char (&data)[64]);
	void update(const void* input,  unsigned int len);
	void finish(unsigned char (&digest)[32]);
};
 
#endif // SHA_INCLUDED