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/*-
* Copyright (c) 2000-2015 Mark R V Murray
* 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
* in this position and unchanged.
* 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 ``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 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef _KERNEL
#include <sys/param.h>
#include <sys/systm.h>
#else /* !_KERNEL */
#include <sys/param.h>
#include <sys/types.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <threads.h>
#include "unit_test.h"
#endif /* _KERNEL */
#include <crypto/rijndael/rijndael-api-fst.h>
#include <crypto/sha2/sha2.h>
#include <dev/random/hash.h>
/* This code presumes that RANDOM_KEYSIZE is twice as large as RANDOM_BLOCKSIZE */
CTASSERT(RANDOM_KEYSIZE == 2*RANDOM_BLOCKSIZE);
/* Initialise the hash */
void
randomdev_hash_init(struct randomdev_hash *context)
{
SHA256_Init(&context->sha);
}
/* Iterate the hash */
void
randomdev_hash_iterate(struct randomdev_hash *context, const void *data, size_t size)
{
SHA256_Update(&context->sha, data, size);
}
/* Conclude by returning the hash in the supplied <*buf> which must be
* RANDOM_KEYSIZE bytes long.
*/
void
randomdev_hash_finish(struct randomdev_hash *context, void *buf)
{
SHA256_Final(buf, &context->sha);
}
/* Initialise the encryption routine by setting up the key schedule
* from the supplied <*data> which must be RANDOM_KEYSIZE bytes of binary
* data.
*/
void
randomdev_encrypt_init(struct randomdev_key *context, const void *data)
{
rijndael_cipherInit(&context->cipher, MODE_ECB, NULL);
rijndael_makeKey(&context->key, DIR_ENCRYPT, RANDOM_KEYSIZE*8, data);
}
/* Encrypt the supplied data using the key schedule preset in the context.
* <length> bytes are encrypted from <*d_in> to <*d_out>. <length> must be
* a multiple of RANDOM_BLOCKSIZE.
*/
void
randomdev_encrypt(struct randomdev_key *context, const void *d_in, void *d_out, u_int length)
{
rijndael_blockEncrypt(&context->cipher, &context->key, d_in, length*8, d_out);
}
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