yarrow.h revision 62765
1258945Sroberto/*- 2258945Sroberto * Copyright (c) 2000 Mark R V Murray 3258945Sroberto * All rights reserved. 4258945Sroberto * 5258945Sroberto * Redistribution and use in source and binary forms, with or without 6258945Sroberto * modification, are permitted provided that the following conditions 7258945Sroberto * are met: 8258945Sroberto * 1. Redistributions of source code must retain the above copyright 9258945Sroberto * notice, this list of conditions and the following disclaimer 10258945Sroberto * in this position and unchanged. 11258945Sroberto * 2. Redistributions in binary form must reproduce the above copyright 12258945Sroberto * notice, this list of conditions and the following disclaimer in the 13258945Sroberto * documentation and/or other materials provided with the distribution. 14258945Sroberto * 15258945Sroberto * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16258945Sroberto * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17258945Sroberto * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18258945Sroberto * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19258945Sroberto * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20258945Sroberto * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21258945Sroberto * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22258945Sroberto * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23258945Sroberto * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24258945Sroberto * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25258945Sroberto * 26258945Sroberto * $FreeBSD: head/sys/dev/random/yarrow.h 62765 2000-07-07 09:03:59Z markm $ 27258945Sroberto */ 28258945Sroberto 29258945Sroberto#define ENTROPYBIN 256 /* buckets to harvest entropy events */ 30258945Sroberto#define ENTROPYSOURCE 2 /* entropy sources (actually classes) */ 31258945Sroberto /* The entropy classes will as follows: */ 32258945Sroberto /* 0 - Keyboard */ 33258945Sroberto /* 1 - Mouse */ 34258945Sroberto /* to start with. More will be added */ 35258945Sroberto 36258945Sroberto#define TIMEBIN 16 /* max value for Pt/t */ 37258945Sroberto#define KEYSIZE 32 /* 32 bytes == 256 bits */ 38258945Sroberto 39258945Sroberto#define FAST 0 40258945Sroberto#define SLOW 1 41258945Sroberto 42258945Srobertovoid random_init(void); 43258945Srobertovoid random_deinit(void); 44258945Srobertovoid random_init_harvester(void (*)(struct timespec *, u_int64_t, u_int, u_int, u_int)); 45258945Srobertovoid random_deinit_harvester(void); 46258945Sroberto 47258945Sroberto/* This is the beasite that needs protecting. It contains all of the 48258945Sroberto * state that we are excited about. 49258945Sroberto * This is a biiig structure. It may move over to a malloc(9)ed 50258945Sroberto * replacement. 51258945Sroberto */ 52258945Srobertostruct random_state { 53258945Sroberto u_int64_t counter; /* C */ 54258945Sroberto BF_KEY key; /* K */ 55258945Sroberto int gengateinterval; /* Pg */ 56258945Sroberto int bins; /* Pt/t */ 57258945Sroberto u_char ivec[8]; /* Blowfish internal */ 58258945Sroberto int outputblocks; /* count output blocks for gates */ 59258945Sroberto u_int slowoverthresh; /* slow pool overthreshhold reseed count */ 60258945Sroberto struct pool { 61258945Sroberto struct source { 62258945Sroberto struct entropy { 63258945Sroberto struct timespec nanotime; 64258945Sroberto u_int64_t data; 65258945Sroberto } entropy[ENTROPYBIN]; /* entropy units - must each 66258945Sroberto be <= KEYSIZE */ 67258945Sroberto u_int bits; /* estimated bits of entropy */ 68258945Sroberto u_int frac; /* fractional bits of entropy 69258945Sroberto (given as 1024/n) */ 70258945Sroberto u_int current; /* next insertion point */ 71258945Sroberto } source[ENTROPYSOURCE]; 72258945Sroberto u_int thresh; /* pool reseed threshhold */ 73258945Sroberto } pool[2]; /* pool[0] is fast, pool[1] is slow */ 74258945Sroberto int which; /* toggle - shows the current insertion pool */ 75258945Sroberto}; 76258945Sroberto 77258945Srobertoextern struct random_state random_state; 78258945Sroberto