freebsd-skq/sys/dev/random/unit_test.h
markm 4637ff6821 * Address review (and add a bit myself).
- Tweek man page.
 - Remove all mention of RANDOM_FORTUNA. If the system owner wants YARROW or DUMMY, they ask for it, otherwise they get FORTUNA.
 - Tidy up headers a bit.
 - Tidy up declarations a bit.
 - Make static in a couple of places where needed.
 - Move Yarrow/Fortuna SYSINIT/SYSUNINIT to randomdev.c, moving us towards a single file where the algorithm context is used.
 - Get rid of random_*_process_buffer() functions. They were only used in one place each, and are better subsumed into those places.
 - Remove *_post_read() functions as they are stubs everywhere.
 - Assert against buffer size illegalities.
 - Clean up some silly code in the randomdev_read() routine.
 - Make the harvesting more consistent.
 - Make some requested argument name changes.
 - Tidy up and clarify a few comments.
 - Make some requested comment changes.
 - Make some requested macro changes.

* NOTE: the thing calling itself a 'unit test' is not yet a proper
  unit test, but it helps me ensure things work. It may be a proper
  unit test at some time in the future, but for now please don't make
  any assumptions or hold any expectations.

Differential Revision:	https://reviews.freebsd.org/D2025
Approved by:	so (/dev/random blanket)
2015-07-12 18:14:38 +00:00

95 lines
2.9 KiB
C

/*-
* Copyright (c) 2013-2015 Mark R V Murray
* 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.
*
* $FreeBSD$
*/
#ifndef UNIT_TEST_H_INCLUDED
#define UNIT_TEST_H_INCLUDED
#ifdef _KERNEL
#error "Random unit tests cannot be compiled into the kernel."
#endif
#include <sys/types.h>
#include <inttypes.h>
#include <stdint.h>
#if defined(clang) && __has_builtin(__builtin_readcyclecounter)
#define rdtsc __builtin_readcyclecounter
#else /* !clang */
#if defined(__amd64__) || defined(__i386__)
static __inline uint64_t
rdtsc(void)
{
uint32_t low, high;
__asm __volatile("rdtsc" : "=a" (low), "=d" (high));
return (low | ((uint64_t)high << 32));
}
#else /* __amd64__ || __i386__ */
#error "No rdtsc() implementation available."
#endif /* __amd64__ || __i386__ */
#endif /* !clang */
static __inline uint64_t
get_cyclecount(void)
{
return (rdtsc());
}
#define HARVESTSIZE 2
#define RANDOM_BLOCKSIZE 16
enum random_entropy_source {
RANDOM_START = 0,
RANDOM_CACHED = 0,
ENTROPYSOURCE = 32
};
struct harvest_event {
uintmax_t he_somecounter; /* fast counter for clock jitter */
uint32_t he_entropy[HARVESTSIZE];/* some harvested entropy */
u_int he_size; /* harvested entropy byte count */
u_int he_bits; /* stats about the entropy */
u_int he_destination; /* destination pool of this entropy */
enum random_entropy_source he_source; /* origin of the entropy */
void * he_next; /* next item on the list */
};
struct sysctl_ctx_list;
#define CTASSERT(x) _Static_assert(x, "compile-time assertion failed")
#define KASSERT(exp,msg) do { \
if (!(exp)) { \
printf msg; \
exit(0); \
} \
} while (0)
#endif /* UNIT_TEST_H_INCLUDED */