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
/*-
|
|
* Copyright (c) 2000-2014 Mark R V Murray
|
|
* Copyright (c) 2004 Robert N. M. Watson
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* This is the loadable infrastructure base file for software CSPRNG
|
|
* drivers such as Yarrow or Fortuna.
|
|
*
|
|
* It is anticipated that one instance of this file will be used
|
|
* for _each_ invocation of a CSPRNG, but with different #defines
|
|
* set. See below.
|
|
*
|
|
*/
|
|
|
|
#include "opt_random.h"
|
|
|
|
#if !defined(RANDOM_YARROW) && !defined(RANDOM_FORTUNA)
|
|
#define RANDOM_YARROW
|
|
#elif defined(RANDOM_YARROW) && defined(RANDOM_FORTUNA)
|
|
#error "Must define either RANDOM_YARROW or RANDOM_FORTUNA"
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/poll.h>
|
|
#include <sys/random.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/unistd.h>
|
|
|
|
#include <dev/random/randomdev.h>
|
|
#include <dev/random/randomdev_soft.h>
|
|
#include <dev/random/random_harvestq.h>
|
|
#include <dev/random/random_adaptors.h>
|
|
#if defined(RANDOM_YARROW)
|
|
#include <dev/random/yarrow.h>
|
|
#endif
|
|
#if defined(RANDOM_FORTUNA)
|
|
#include <dev/random/fortuna.h>
|
|
#endif
|
|
|
|
static struct random_adaptor random_soft_processor = {
|
|
#if defined(RANDOM_YARROW)
|
|
#define RANDOM_CSPRNG_NAME "yarrow"
|
|
.ra_ident = "Yarrow",
|
|
.ra_priority = 90, /* High priority, so top of the list. Fortuna may still win. */
|
|
.ra_read = random_yarrow_read,
|
|
.ra_write = random_yarrow_write,
|
|
.ra_reseed = random_yarrow_reseed,
|
|
.ra_seeded = random_yarrow_seeded,
|
|
#endif
|
|
#if defined(RANDOM_FORTUNA)
|
|
#define RANDOM_CSPRNG_NAME "fortuna"
|
|
.ra_ident = "Fortuna",
|
|
.ra_priority = 100, /* High priority, so top of the list. Beat Yarrow. */
|
|
.ra_read = random_fortuna_read,
|
|
.ra_write = random_fortuna_write,
|
|
.ra_reseed = random_fortuna_reseed,
|
|
.ra_seeded = random_fortuna_seeded,
|
|
#endif
|
|
.ra_init = randomdev_init,
|
|
.ra_deinit = randomdev_deinit,
|
|
};
|
|
|
|
void
|
|
randomdev_init(void)
|
|
{
|
|
|
|
#if defined(RANDOM_YARROW)
|
|
random_yarrow_init_alg();
|
|
random_harvestq_init(random_yarrow_process_event, 2);
|
|
#endif
|
|
#if defined(RANDOM_FORTUNA)
|
|
random_fortuna_init_alg();
|
|
random_harvestq_init(random_fortuna_process_event, 32);
|
|
#endif
|
|
|
|
/* Register the randomness harvesting routine */
|
|
randomdev_init_harvester(random_harvestq_internal);
|
|
}
|
|
|
|
void
|
|
randomdev_deinit(void)
|
|
{
|
|
/* Deregister the randomness harvesting routine */
|
|
randomdev_deinit_harvester();
|
|
|
|
#if defined(RANDOM_YARROW)
|
|
random_yarrow_deinit_alg();
|
|
#endif
|
|
#if defined(RANDOM_FORTUNA)
|
|
random_fortuna_deinit_alg();
|
|
#endif
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
randomdev_soft_modevent(module_t mod __unused, int type, void *unused __unused)
|
|
{
|
|
int error = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
printf("random: SOFT: %s init()\n", RANDOM_CSPRNG_NAME);
|
|
random_adaptor_register(RANDOM_CSPRNG_NAME, &random_soft_processor);
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
random_adaptor_deregister(RANDOM_CSPRNG_NAME);
|
|
break;
|
|
|
|
case MOD_SHUTDOWN:
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#if defined(RANDOM_YARROW)
|
|
DEV_MODULE(yarrow, randomdev_soft_modevent, NULL);
|
|
MODULE_VERSION(yarrow, 1);
|
|
MODULE_DEPEND(yarrow, randomdev, 1, 1, 1);
|
|
#endif
|
|
#if defined(RANDOM_FORTUNA)
|
|
DEV_MODULE(fortuna, randomdev_soft_modevent, NULL);
|
|
MODULE_VERSION(fortuna, 1);
|
|
MODULE_DEPEND(fortuna, randomdev, 1, 1, 1);
|
|
#endif
|