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Diffstat (limited to 'sys/dev/random/yarrow.h')
| -rw-r--r-- | sys/dev/random/yarrow.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sys/dev/random/yarrow.h b/sys/dev/random/yarrow.h new file mode 100644 index 0000000..2fc7be2 --- /dev/null +++ b/sys/dev/random/yarrow.h @@ -0,0 +1,59 @@ +/*- + * Copyright (c) 2000 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 */ +}; |
