2 * Copyright (c) 2000-2015 Mark R V Murray
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
29 #ifndef SYS_DEV_RANDOM_HASH_H_INCLUDED
30 #define SYS_DEV_RANDOM_HASH_H_INCLUDED
32 #include <crypto/chacha20/_chacha.h>
33 #include <dev/random/uint128.h>
36 #define __read_frequently
39 /* Keys are formed from cipher blocks */
40 #define RANDOM_KEYSIZE 32 /* (in bytes) == 256 bits */
41 #define RANDOM_KEYSIZE_WORDS (RANDOM_KEYSIZE/sizeof(uint32_t))
42 #define RANDOM_BLOCKSIZE 16 /* (in bytes) == 128 bits */
43 #define RANDOM_BLOCKSIZE_WORDS (RANDOM_BLOCKSIZE/sizeof(uint32_t))
44 #define RANDOM_KEYS_PER_BLOCK (RANDOM_KEYSIZE/RANDOM_BLOCKSIZE)
46 /* The size of the zero block portion used to form H_d(m) */
47 #define RANDOM_ZERO_BLOCKSIZE 64 /* (in bytes) == 512 zero bits */
49 struct randomdev_hash {
55 keyInstance key; /* Key schedule */
56 cipherInstance cipher; /* Rijndael internal */
58 struct chacha_ctx chacha;
61 extern bool random_chachamode;
63 void randomdev_hash_init(struct randomdev_hash *);
64 void randomdev_hash_iterate(struct randomdev_hash *, const void *, size_t);
65 void randomdev_hash_finish(struct randomdev_hash *, void *);
67 void randomdev_encrypt_init(union randomdev_key *, const void *);
68 void randomdev_keystream(union randomdev_key *context, uint128_t *, void *, size_t);
69 void randomdev_getkey(union randomdev_key *, const void **, size_t *);
71 #endif /* SYS_DEV_RANDOM_HASH_H_INCLUDED */