Current Path : /sys/dev/random/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/random/yarrow.h |
/*- * Copyright (c) 2000-2004 Mark R V Murray * All rights reserved. * * 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 * in this position and unchanged. * 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 ``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 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: release/9.1.0/sys/dev/random/yarrow.h 128059 2004-04-09 15:47:10Z markm $ */ /* This contains Yarrow-specific declarations. * See http://www.counterpane.com/yarrow.html */ #define TIMEBIN 16 /* max value for Pt/t */ #define FAST 0 #define SLOW 1 /* This is the beastie that needs protecting. It contains all of the * state that we are excited about. * Exactly one will be instantiated. */ struct random_state { u_int64_t counter[4]; /* C - 256 bits */ struct yarrowkey key; /* K */ u_int gengateinterval; /* Pg */ u_int bins; /* Pt/t */ u_int outputblocks; /* count output blocks for gates */ u_int slowoverthresh; /* slow pool overthreshhold reseed count */ struct pool { struct source { u_int bits; /* estimated bits of entropy */ u_int frac; /* fractional bits of entropy (given as 1024/n) */ } source[ENTROPYSOURCE]; u_int thresh; /* pool reseed threshhold */ struct yarrowhash hash; /* accumulated entropy */ } pool[2]; /* pool[0] is fast, pool[1] is slow */ u_int which; /* toggle - sets the current insertion pool */ };