59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
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/* $NetBSD: rnd_private.h,v 1.1 2011/11/29 03:50:31 tls Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Michael Graff <explorer@flame.org>. This code uses ideas and
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* algorithms from the Linux driver written by Ted Ts'o.
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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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* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_RNDPRIVATE_H
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#define _DEV_RNDPRIVATE_H
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/*
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* Number of bytes returned per hash. This value is used in both
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* rnd.c and rndpool.c to decide when enough entropy exists to do a
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* hash to extract it.
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*/
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#define RND_ENTROPY_THRESHOLD 10
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/*
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* Size of the event queue. This _MUST_ be a power of 2.
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*/
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#ifndef RND_EVENTQSIZE
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#define RND_EVENTQSIZE 128
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#endif
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/*
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* Used by rnd_extract_data() and rndpool_extract_data() to describe how
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* "good" the data has to be.
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*/
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#define RND_EXTRACT_ANY 0 /* extract anything, even if no entropy */
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#define RND_EXTRACT_GOOD 1 /* return as many good bytes
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(short read ok) */
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uint32_t rnd_extract_data(void *, uint32_t, uint32_t);
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#endif
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