1/*-
2 * Copyright (c) 2000-2015 Mark R V Murray
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#ifndef SYS_DEV_RANDOM_HASH_H_INCLUDED
30#define	SYS_DEV_RANDOM_HASH_H_INCLUDED
31
32/* Keys are formed from cipher blocks */
33#define	RANDOM_KEYSIZE		32	/* (in bytes) == 256 bits */
34#define	RANDOM_KEYSIZE_WORDS	(RANDOM_KEYSIZE/sizeof(uint32_t))
35#define	RANDOM_BLOCKSIZE	16	/* (in bytes) == 128 bits */
36#define	RANDOM_BLOCKSIZE_WORDS	(RANDOM_BLOCKSIZE/sizeof(uint32_t))
37#define	RANDOM_KEYS_PER_BLOCK	(RANDOM_KEYSIZE/RANDOM_BLOCKSIZE)
38
39/* The size of the zero block portion used to form H_d(m) */
40#define	RANDOM_ZERO_BLOCKSIZE	64	/* (in bytes) == 512 zero bits */
41
42struct randomdev_hash {
43	SHA256_CTX	sha;
44};
45
46struct randomdev_key {
47	keyInstance key;	/* Key schedule */
48	cipherInstance cipher;	/* Rijndael internal */
49};
50
51void randomdev_hash_init(struct randomdev_hash *);
52void randomdev_hash_iterate(struct randomdev_hash *, const void *, size_t);
53void randomdev_hash_finish(struct randomdev_hash *, void *);
54void randomdev_encrypt_init(struct randomdev_key *, const void *);
55void randomdev_encrypt(struct randomdev_key *context, const void *, void *, u_int);
56
57#endif /* SYS_DEV_RANDOM_HASH_H_INCLUDED */
58