1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 #pragma once 30 31 #include <dev/random/fenestrasX/fx_priv.h> 32 #define blake2b_init blake2b_init_ref 33 #define blake2b_update blake2b_update_ref 34 #define blake2b_final blake2b_final_ref 35 #include <contrib/libb2/blake2.h> 36 37 #define FXRNG_HASH_SZ BLAKE2B_OUTBYTES /* 64 */ 38 39 /* 40 * Wrappers for hash function abstraction. 41 */ 42 struct fxrng_hash { 43 blake2b_state state; 44 }; 45 46 static inline void 47 fxrng_hash_init(struct fxrng_hash *h) 48 { 49 int rc; 50 51 rc = blake2b_init(&h->state, FXRNG_HASH_SZ); 52 ASSERT(rc == 0, "blake2b_init"); 53 } 54 55 static inline void 56 fxrng_hash_update(struct fxrng_hash *h, const void *buf, size_t sz) 57 { 58 int rc; 59 60 rc = blake2b_update(&h->state, buf, sz); 61 ASSERT(rc == 0, "blake2b_update"); 62 } 63 64 static inline void 65 fxrng_hash_finish(struct fxrng_hash *h, uint8_t buf[static FXRNG_HASH_SZ], size_t sz) 66 { 67 int rc; 68 69 rc = blake2b_final(&h->state, buf, sz); 70 ASSERT(rc == 0, "blake2b_final(sz=%zu)", sz); 71 explicit_bzero(h, sizeof(*h)); 72 } 73