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/* $OpenBSD: rndvar.h,v 1.12 2000/03/19 17:38:03 mickey Exp $ */
/*
* Copyright (c) 1996 Michael Shalayeff.
*
* This software derived from one contributed by Theodore Ts'o.
*
* 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.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Theodore Ts'o.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
*/
#ifndef __RNDVAR_H__
#define __RNDVAR_H__
#define POOLWORDS 128 /* Power of 2 - note that this is 32-bit words */
#define RND_RND 0 /* real randomness like nuclear chips */
#define RND_SRND 1 /* strong random source */
#define RND_URND 2 /* less strong random source */
#define RND_PRND 3 /* pseudo random source */
#define RND_ARND 4 /* aRC4 based random number generator */
#define RND_NODEV 5 /* First invalid minor device number */
struct rndstats {
u_long rnd_total; /* total bits of entropy generated */
u_long rnd_used; /* strong data bits read so far */
u_long arc4_reads;/* aRC4 data bytes read so far */
u_long rnd_timer; /* timer calls */
u_long rnd_mouse; /* mouse calls */
u_long rnd_tty; /* tty calls */
u_long rnd_disk; /* block devices calls */
u_long rnd_net; /* net calls */
u_long rnd_reads; /* strong read calls */
u_long rnd_waits; /* sleep for data */
u_long rnd_enqs; /* enqueue calls */
u_long rnd_deqs; /* dequeue calls */
u_long rnd_drops; /* queue-full drops */
u_long rnd_drople;/* queue low watermark low entropy drops */
u_long rnd_asleep;/* sleeping for the data */
u_long rnd_queued;/* queued for processing */
u_long arc4_stirs;/* arc4 pool stirs */
u_long rnd_ed[32];/* entropy feed distribution */
};
#ifdef _KERNEL
extern struct rndstats rndstats;
extern void add_mouse_randomness __P((u_int32_t));
extern void add_net_randomness __P((int));
extern void add_disk_randomness __P((u_int32_t));
extern void add_tty_randomness __P((int));
extern void get_random_bytes __P((void *, size_t));
extern u_int32_t arc4random __P((void));
extern int arc4random_8 __P((void));
#endif /* _KERNEL */
#endif /* __RNDVAR_H__ */
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