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This is work-in-progress, and the entropy-gathering routines are not yet present. As such, this should be viewed as a pretty reasonable PRNG with _ABSOLUTELY_NO_ security!! Entropy gathering will be the subject of ongoing work. This is written as a module, and as such is unloadable, but there is no refcounting done. I would like to use something like device_busy(9) to achieve this (eventually). Lots of useful ideas from: bde, phk, Jeroen van Gelderen Reviewed by: dfr
43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/*-
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* Copyright (c) 2000 Mark Murray
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define BINS 10 /* t */
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#define KEYSIZE 32 /* 32 bytes == 256 bits */
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/* This is the beasite that needs protecting. It contains all of the
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* state that we are excited about.
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*/
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struct state {
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u_int64_t counter; /* C */
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BF_KEY key; /* K */
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unsigned char ivec[8]; /* Blowfish internal */
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int gengateinterval; /* Pg */
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int outputblocks;
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unsigned char randomstuff[1024]; /* XXX to be done properly */
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};
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