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
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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.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/param.h>
36 #include <sys/types.h>
42 #include "unit_test.h"
45 #include <crypto/rijndael/rijndael-api-fst.h>
46 #include <crypto/sha2/sha2.h>
48 #include <dev/random/hash.h>
50 /* This code presumes that RANDOM_KEYSIZE is twice as large as RANDOM_BLOCKSIZE */
51 CTASSERT(RANDOM_KEYSIZE == 2*RANDOM_BLOCKSIZE);
53 /* Initialise the hash */
55 randomdev_hash_init(struct randomdev_hash *context)
58 SHA256_Init(&context->sha);
61 /* Iterate the hash */
63 randomdev_hash_iterate(struct randomdev_hash *context, const void *data, size_t size)
66 SHA256_Update(&context->sha, data, size);
69 /* Conclude by returning the hash in the supplied <*buf> which must be
70 * RANDOM_KEYSIZE bytes long.
73 randomdev_hash_finish(struct randomdev_hash *context, void *buf)
76 SHA256_Final(buf, &context->sha);
79 /* Initialise the encryption routine by setting up the key schedule
80 * from the supplied <*data> which must be RANDOM_KEYSIZE bytes of binary
84 randomdev_encrypt_init(struct randomdev_key *context, const void *data)
87 rijndael_cipherInit(&context->cipher, MODE_ECB, NULL);
88 rijndael_makeKey(&context->key, DIR_ENCRYPT, RANDOM_KEYSIZE*8, data);
91 /* Encrypt the supplied data using the key schedule preset in the context.
92 * <length> bytes are encrypted from <*d_in> to <*d_out>. <length> must be
93 * a multiple of RANDOM_BLOCKSIZE.
96 randomdev_encrypt(struct randomdev_key *context, const void *d_in, void *d_out, u_int length)
99 rijndael_blockEncrypt(&context->cipher, &context->key, d_in, length*8, d_out);