1 /* $NetBSD: entpool.h,v 1.1 2020/04/30 03:28:19 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef ENTPOOL_H 33 #define ENTPOOL_H 34 35 #include <sys/types.h> 36 #include <sys/endian.h> 37 38 #if defined(_KERNEL) || defined(_STANDALONE) 39 #include <sys/stdbool.h> 40 #else 41 #include <stdbool.h> 42 #endif 43 44 #if ENTPOOL_SMALL 45 #define ENTPOOL_HEADER <gimli.h> 46 #define ENTPOOL_PERMUTE gimli 47 #define ENTPOOL_SIZE 48 48 #define ENTPOOL_WORD uint32_t 49 #define ENTPOOL_WTOH le32toh 50 #define ENTPOOL_HTOW htole32 51 #define ENTPOOL_SECURITY 16 52 #else 53 #define ENTPOOL_HEADER <keccak.h> 54 #define ENTPOOL_PERMUTE keccakf1600 55 #define ENTPOOL_SIZE 200 56 #define ENTPOOL_WORD uint64_t 57 #define ENTPOOL_WTOH le64toh 58 #define ENTPOOL_HTOW htole64 59 #define ENTPOOL_SECURITY 16 60 #endif 61 62 #define ENTPOOL_CAPACITY (2*ENTPOOL_SECURITY) 63 #define ENTPOOL_RATE (ENTPOOL_SIZE - ENTPOOL_CAPACITY) 64 65 struct entpool { 66 union { 67 uint8_t u8[ENTPOOL_SIZE]; 68 ENTPOOL_WORD w[ENTPOOL_SIZE/sizeof(ENTPOOL_WORD)]; 69 } s; 70 unsigned i; 71 }; 72 73 int entpool_selftest(void); 74 void entpool_enter(struct entpool *, const void *, size_t); 75 bool entpool_enter_nostir(struct entpool *, const void *, size_t); 76 void entpool_stir(struct entpool *); 77 void entpool_extract(struct entpool *, void *, size_t); 78 79 #endif /* ENTPOOL_H */ 80