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head/sys/dev/random/fenestrasX/fx_brng.h
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| /*- | |||||
| * SPDX-License-Identifier: BSD-2-Clause-FreeBSD | |||||
| * | |||||
| * 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_rng.h> | |||||
| #define FXRNG_BUFRNG_SZ 128 | |||||
| /* | |||||
| * An object representing a buffered random number generator with forward | |||||
| * secrecy (aka "fast-key-erasure"). | |||||
| * | |||||
| * There is a single static root instance of this object associated with the | |||||
| * entropy harvester, as well as additional instances per CPU, lazily allocated | |||||
| * in NUMA-local memory, seeded from output of the root generator. | |||||
| */ | |||||
| struct fxrng_buffered_rng { | |||||
| struct fxrng_basic_rng brng_rng; | |||||
| #define FXRNG_BRNG_LOCK(brng) mtx_lock(&(brng)->brng_rng.rng_lk) | |||||
| #define FXRNG_BRNG_UNLOCK(brng) mtx_unlock(&(brng)->brng_rng.rng_lk) | |||||
| #define FXRNG_BRNG_ASSERT(brng) mtx_assert(&(brng)->brng_rng.rng_lk, MA_OWNED) | |||||
| #define FXRNG_BRNG_ASSERT_NOT(brng) \ | |||||
| mtx_assert(&(brng)->brng_rng.rng_lk, MA_NOTOWNED) | |||||
| /* Entropy reseed generation ("seed version"). */ | |||||
| uint64_t brng_generation; | |||||
| /* Buffered output for quick access by small requests. */ | |||||
| uint8_t brng_buffer[FXRNG_BUFRNG_SZ]; | |||||
| uint8_t brng_avail_idx; | |||||
| }; | |||||
| void fxrng_brng_init(struct fxrng_buffered_rng *); | |||||
| void fxrng_brng_produce_seed_data_internal(struct fxrng_buffered_rng *, void *, | |||||
| size_t, uint64_t *seed_generation); | |||||
| void fxrng_brng_read(struct fxrng_buffered_rng *, void *, size_t); | |||||
| void fxrng_brng_reseed(const void *, size_t); | |||||
| struct harvest_event; | |||||
| void fxrng_brng_src_reseed(const struct harvest_event *); | |||||