1/*	$NetBSD: entpool.h,v 1.1 2020/04/30 03:28:19 riastradh Exp $	*/
2
3/*-
4 * Copyright (c) 2019 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef	ENTPOOL_H
33#define	ENTPOOL_H
34
35#include <sys/types.h>
36#include <sys/endian.h>
37
38#if defined(_KERNEL) || defined(_STANDALONE)
39#include <sys/stdbool.h>
40#else
41#include <stdbool.h>
42#endif
43
44#if ENTPOOL_SMALL
45#define	ENTPOOL_HEADER		<gimli.h>
46#define	ENTPOOL_PERMUTE		gimli
47#define	ENTPOOL_SIZE		48
48#define	ENTPOOL_WORD		uint32_t
49#define	ENTPOOL_WTOH		le32toh
50#define	ENTPOOL_HTOW		htole32
51#define	ENTPOOL_SECURITY	16
52#else
53#define	ENTPOOL_HEADER		<keccak.h>
54#define	ENTPOOL_PERMUTE		keccakf1600
55#define	ENTPOOL_SIZE		200
56#define	ENTPOOL_WORD		uint64_t
57#define	ENTPOOL_WTOH		le64toh
58#define	ENTPOOL_HTOW		htole64
59#define	ENTPOOL_SECURITY	16
60#endif
61
62#define	ENTPOOL_CAPACITY	(2*ENTPOOL_SECURITY)
63#define	ENTPOOL_RATE		(ENTPOOL_SIZE - ENTPOOL_CAPACITY)
64
65struct entpool {
66	union {
67		uint8_t		u8[ENTPOOL_SIZE];
68		ENTPOOL_WORD	w[ENTPOOL_SIZE/sizeof(ENTPOOL_WORD)];
69	}		s;
70	unsigned	i;
71};
72
73int	entpool_selftest(void);
74void	entpool_enter(struct entpool *, const void *, size_t);
75bool	entpool_enter_nostir(struct entpool *, const void *, size_t);
76void	entpool_stir(struct entpool *);
77void	entpool_extract(struct entpool *, void *, size_t);
78
79#endif	/* ENTPOOL_H */
80