YespowerMbc.c

/*
 * Copyright 2011 ArtForz, 2011-2014 pooler, 2018 The Resistance developers, 2020 The Sugarchain Yumekawa developers
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is loosly based on a tiny portion of pooler's cpuminer scrypt.c.
 */

#include "cpuminer-config.h"
#include "miner.h"

#include "yespower-1.0.1-power2b/yespower-p2b.h"

#include <stdlib.h>
#include <string.h>
#include <inttypes.h>

int scanhash_mbc_yespower(int thr_id, uint32_t *pdata,
	const uint32_t *ptarget,
	uint32_t max_nonce, unsigned long *hashes_done)
{
	static const yespower_params_t params = {
		.version = YESPOWER_1_0_BLAKE2B,
		.N = 2048,
		.r = 32,
		.pers = (const uint8_t *)"Now I am become Death, the destroyer of worlds",
		.perslen = 46
	};
	union {
		uint8_t u8[8];
		uint32_t u32[20];
	} data;
	union {
		yespower_binary_t_p2b yb;
		uint32_t u32[7];
	} hash;
	uint32_t n = pdata[19] - 1;
	const uint32_t Htarg = ptarget[7];
	int i;

	for (i = 0; i < 19; i++)
		be32enc(&data.u32[i], pdata[i]);

	do {
		be32enc(&data.u32[19], ++n);

		if (yespower_tls_p2b(data.u8, 80, &params, &hash.yb))
			abort();

		if (le32dec(&hash.u32[7]) <= Htarg) {
			for (i = 0; i < 7; i++)
				hash.u32[i] = le32dec(&hash.u32[i]);
			if (fulltest(hash.u32, ptarget)) {
				*hashes_done = n - pdata[19] + 1;
				pdata[19] = n;
				return 1;
			}
		}
	} while (n < max_nonce && !work_restart[thr_id].restart);

	*hashes_done = n - pdata[19] + 1;
	pdata[19] = n;
	return 0;
}