mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-28 11:57:28 +00:00
e7806b4c0e
can more easily be used INSTEAD OF the hard-working Yarrow. The only hardware source used at this point is the one inside the VIA C3 Nehemiah (Stepping 3 and above) CPU. More sources will be added in due course. Contributions welcome!
60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
/*-
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/* 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 */
|
|
};
|