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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>
*
* 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.
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#pragma once
#include <dev/random/fenestrasX/fx_priv.h>
#define blake2b_init blake2b_init_ref
#define blake2b_update blake2b_update_ref
#define blake2b_final blake2b_final_ref
#include <contrib/libb2/blake2.h>
#define FXRNG_HASH_SZ BLAKE2B_OUTBYTES /* 64 */
/*
* Wrappers for hash function abstraction.
*/
struct fxrng_hash {
blake2b_state state;
};
static inline void
fxrng_hash_init(struct fxrng_hash *h)
{
int rc;
rc = blake2b_init(&h->state, FXRNG_HASH_SZ);
ASSERT(rc == 0, "blake2b_init");
}
static inline void
fxrng_hash_update(struct fxrng_hash *h, const void *buf, size_t sz)
{
int rc;
rc = blake2b_update(&h->state, buf, sz);
ASSERT(rc == 0, "blake2b_update");
}
static inline void
fxrng_hash_finish(struct fxrng_hash *h, uint8_t buf[static FXRNG_HASH_SZ], size_t sz)
{
int rc;
rc = blake2b_final(&h->state, buf, sz);
ASSERT(rc == 0, "blake2b_final(sz=%zu)", sz);
explicit_bzero(h, sizeof(*h));
}
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