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48e279eaa7
- Remove duplicated sources between standard part of the kernel and module. In particular, it caused duplicated lock initialization and sysctl registration, both having bad consequences. - Add missed source files to module. - Static part of the kernel provides randomdev module, not random_adaptors. Correct dependencies. - Use cdev modules declaration macros. Approved by: secteam (delphij) Reviewed by: markm
166 lines
4.6 KiB
C
166 lines
4.6 KiB
C
/*-
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* Copyright (c) 2000-2014 Mark R V Murray
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* Copyright (c) 2004 Robert N. M. Watson
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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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*/
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/*
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* This is the loadable infrastructure base file for software CSPRNG
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* drivers such as Yarrow or Fortuna.
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*
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* It is anticipated that one instance of this file will be used
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* for _each_ invocation of a CSPRNG, but with different #defines
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* set. See below.
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*
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*/
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#include "opt_random.h"
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#if !defined(RANDOM_YARROW) && !defined(RANDOM_FORTUNA)
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#define RANDOM_YARROW
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#elif defined(RANDOM_YARROW) && defined(RANDOM_FORTUNA)
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#error "Must define either RANDOM_YARROW or RANDOM_FORTUNA"
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/poll.h>
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#include <sys/random.h>
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#include <sys/sysctl.h>
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#include <sys/unistd.h>
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#include <dev/random/randomdev.h>
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#include <dev/random/randomdev_soft.h>
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#include <dev/random/random_harvestq.h>
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#include <dev/random/random_adaptors.h>
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#if defined(RANDOM_YARROW)
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#include <dev/random/yarrow.h>
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#endif
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#if defined(RANDOM_FORTUNA)
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#include <dev/random/fortuna.h>
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#endif
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static struct random_adaptor random_soft_processor = {
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#if defined(RANDOM_YARROW)
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#define RANDOM_CSPRNG_NAME "yarrow"
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.ra_ident = "Yarrow",
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.ra_priority = 90, /* High priority, so top of the list. Fortuna may still win. */
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.ra_read = random_yarrow_read,
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.ra_write = random_yarrow_write,
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.ra_reseed = random_yarrow_reseed,
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.ra_seeded = random_yarrow_seeded,
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#endif
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#if defined(RANDOM_FORTUNA)
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#define RANDOM_CSPRNG_NAME "fortuna"
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.ra_ident = "Fortuna",
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.ra_priority = 100, /* High priority, so top of the list. Beat Yarrow. */
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.ra_read = random_fortuna_read,
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.ra_write = random_fortuna_write,
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.ra_reseed = random_fortuna_reseed,
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.ra_seeded = random_fortuna_seeded,
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#endif
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.ra_init = randomdev_init,
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.ra_deinit = randomdev_deinit,
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};
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void
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randomdev_init(void)
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{
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#if defined(RANDOM_YARROW)
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random_yarrow_init_alg();
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random_harvestq_init(random_yarrow_process_event, 2);
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#endif
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#if defined(RANDOM_FORTUNA)
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random_fortuna_init_alg();
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random_harvestq_init(random_fortuna_process_event, 32);
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#endif
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/* Register the randomness harvesting routine */
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randomdev_init_harvester(random_harvestq_internal);
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}
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void
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randomdev_deinit(void)
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{
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/* Deregister the randomness harvesting routine */
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randomdev_deinit_harvester();
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#if defined(RANDOM_YARROW)
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random_yarrow_deinit_alg();
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#endif
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#if defined(RANDOM_FORTUNA)
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random_fortuna_deinit_alg();
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#endif
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}
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/* ARGSUSED */
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static int
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randomdev_soft_modevent(module_t mod __unused, int type, void *unused __unused)
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{
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int error = 0;
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switch (type) {
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case MOD_LOAD:
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printf("random: SOFT: %s init()\n", RANDOM_CSPRNG_NAME);
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random_adaptor_register(RANDOM_CSPRNG_NAME, &random_soft_processor);
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break;
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case MOD_UNLOAD:
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random_adaptor_deregister(RANDOM_CSPRNG_NAME);
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break;
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case MOD_SHUTDOWN:
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break;
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default:
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error = EOPNOTSUPP;
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break;
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}
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return (error);
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}
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#if defined(RANDOM_YARROW)
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DEV_MODULE(yarrow, randomdev_soft_modevent, NULL);
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MODULE_VERSION(yarrow, 1);
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MODULE_DEPEND(yarrow, randomdev, 1, 1, 1);
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#endif
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#if defined(RANDOM_FORTUNA)
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DEV_MODULE(fortuna, randomdev_soft_modevent, NULL);
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MODULE_VERSION(fortuna, 1);
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MODULE_DEPEND(fortuna, randomdev, 1, 1, 1);
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#endif
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