646041a89a
if desired. Retire randomdev_none.c and introduce random_infra.c for resident infrastructure. Completely stub out random(4) calls in the "without DEV_RANDOM" case. Add RANDOM_LOADABLE option to allow loadable Yarrow/Fortuna/LocallyWritten algorithm. Add a skeleton "other" algorithm framework for folks to add their own processing code. NIST, anyone? Retire the RANDOM_DUMMY option. Build modules for Yarrow, Fortuna and "other". Use atomics for the live entropy rate-tracking. Convert ints to bools for the 'seeded' logic. Move _write() function from the algorithm-specific areas to randomdev.c Get rid of reseed() function - it is unused. Tidy up the opt_*.h includes. Update documentation for random(4) modules. Fix test program (reviewers, please leave this). Differential Revision: https://reviews.freebsd.org/D3354 Reviewed by: wblock,delphij,jmg,bjk Approved by: so (/dev/random blanket)
63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
/*-
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* Copyright (c) 2015 Mark R V 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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/*-
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* This is a skeleton for folks who wish to build a loadable module
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* containing an alternative entropy-processing algorithm for random(4).
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*
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* The functions below should be completed with the appropriate code,
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* and the nearby yarrow.c and fortuna.c may be consulted for examples
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* of working code.
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*
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* The author is willing to provide reasonable help to those wishing to
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* write such a module for themselves. Please use the markm@ FreeBSD
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* email address, and ensure that you are developing this on a suitably
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* supported branch (This is currently 11-CURRENT, and will be no
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* older than 11-STABLE in the future).
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*/
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#ifndef SYS_DEV_RANDOM_OTHER_H_INCLUDED
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#define SYS_DEV_RANDOM_OTHER_H_INCLUDED
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#ifdef _KERNEL
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typedef struct mtx mtx_t;
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#define RANDOM_RESEED_INIT_LOCK(x) mtx_init(&other_mtx, "reseed mutex", NULL, MTX_DEF)
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#define RANDOM_RESEED_DEINIT_LOCK(x) mtx_destroy(&other_mtx)
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#define RANDOM_RESEED_LOCK(x) mtx_lock(&other_mtx)
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#define RANDOM_RESEED_UNLOCK(x) mtx_unlock(&other_mtx)
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#define RANDOM_RESEED_ASSERT_LOCK_OWNED(x) mtx_assert(&other_mtx, MA_OWNED)
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#else
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#define RANDOM_RESEED_INIT_LOCK(x) mtx_init(&other_mtx, mtx_plain)
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#define RANDOM_RESEED_DEINIT_LOCK(x) mtx_destroy(&other_mtx)
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#define RANDOM_RESEED_LOCK(x) mtx_lock(&other_mtx)
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#define RANDOM_RESEED_UNLOCK(x) mtx_unlock(&other_mtx)
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#define RANDOM_RESEED_ASSERT_LOCK_OWNED(x)
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#endif
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#endif /* SYS_DEV_RANDOM_OTHER_H_INCLUDED */
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