2 * Copyright (c) 2000 Mark R V Murray
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
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.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 /* This contains Yarrow-specific declarations.
30 * See http://www.counterpane.com/yarrow.html
33 #define TIMEBIN 16 /* max value for Pt/t */
38 /* This is the beastie that needs protecting. It contains all of the
39 * state that we are excited about.
40 * Exactly one will be instantiated.
43 u_int64_t counter[4]; /* C - 256 bits */
44 struct yarrowkey key; /* K */
45 u_int gengateinterval; /* Pg */
46 u_int bins; /* Pt/t */
47 u_int outputblocks; /* count output blocks for gates */
48 u_int slowoverthresh; /* slow pool overthreshhold reseed count */
51 u_int bits; /* estimated bits of entropy */
52 u_int frac; /* fractional bits of entropy
54 } source[ENTROPYSOURCE];
55 u_int thresh; /* pool reseed threshhold */
56 struct yarrowhash hash; /* accumulated entropy */
57 } pool[2]; /* pool[0] is fast, pool[1] is slow */
58 u_int which; /* toggle - sets the current insertion pool */