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Annotation of sys/dev/rndvar.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: rndvar.h,v 1.19 2003/11/03 18:24:28 tedu Exp $        */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1996,2000 Michael Shalayeff.
        !             5:  *
        !             6:  * This software derived from one contributed by Theodore Ts'o.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  *
        !            29:  */
        !            30:
        !            31: #ifndef __RNDVAR_H__
        !            32: #define __RNDVAR_H__
        !            33:
        !            34: #define POOLWORDS 1024 /* Power of 2 - note that this is 32-bit words */
        !            35:
        !            36: #define        RND_RND         0       /* real randomness like nuclear chips */
        !            37: #define        RND_SRND        1       /* strong random source */
        !            38: #define        RND_URND        2       /* less strong random source */
        !            39: #define        RND_PRND        3       /* pseudo random source */
        !            40: #define RND_ARND       4       /* aRC4 based random number generator */
        !            41: #define RND_NODEV      5       /* First invalid minor device number */
        !            42:
        !            43: #define        RND_SRC_TRUE    0
        !            44: #define        RND_SRC_TIMER   1
        !            45: #define        RND_SRC_MOUSE   2
        !            46: #define        RND_SRC_TTY     3
        !            47: #define        RND_SRC_DISK    4
        !            48: #define        RND_SRC_NET     5
        !            49: #define        RND_SRC_AUDIO   6
        !            50: #define        RND_SRC_VIDEO   7
        !            51: #define        RND_SRC_NUM     8
        !            52:
        !            53: struct rndstats {
        !            54:        quad_t rnd_total;       /* total bits of entropy generated */
        !            55:        quad_t rnd_used;        /* strong data bits read so far */
        !            56:        quad_t rnd_reads;       /* strong read calls */
        !            57:        quad_t arc4_reads;      /* aRC4 data bytes read so far */
        !            58:        quad_t arc4_nstirs;     /* arc4 pool stirs */
        !            59:        quad_t arc4_stirs;      /* arc4 pool stirs (bits used) */
        !            60:
        !            61:        quad_t rnd_pad[5];
        !            62:
        !            63:        quad_t rnd_waits;       /* sleeps for data */
        !            64:        quad_t rnd_enqs;        /* enqueue calls */
        !            65:        quad_t rnd_deqs;        /* dequeue calls */
        !            66:        quad_t rnd_drops;       /* queue-full drops */
        !            67:        quad_t rnd_drople;      /* queue low watermark low entropy drops */
        !            68:
        !            69:        quad_t rnd_ed[32];      /* entropy feed distribution */
        !            70:        quad_t rnd_sc[RND_SRC_NUM]; /* add* calls */
        !            71:        quad_t rnd_sb[RND_SRC_NUM]; /* add* bits */
        !            72: };
        !            73:
        !            74: #ifdef _KERNEL
        !            75: extern struct rndstats rndstats;
        !            76:
        !            77: #define        add_true_randomness(d)  enqueue_randomness(RND_SRC_TRUE,  (int)(d))
        !            78: #define        add_timer_randomness(d) enqueue_randomness(RND_SRC_TIMER, (int)(d))
        !            79: #define        add_mouse_randomness(d) enqueue_randomness(RND_SRC_MOUSE, (int)(d))
        !            80: #define        add_tty_randomness(d)   enqueue_randomness(RND_SRC_TTY,   (int)(d))
        !            81: #define        add_disk_randomness(d)  enqueue_randomness(RND_SRC_DISK,  (int)(d))
        !            82: #define        add_net_randomness(d)   enqueue_randomness(RND_SRC_NET,   (int)(d))
        !            83: #define        add_audio_randomness(d) enqueue_randomness(RND_SRC_AUDIO, (int)(d))
        !            84: #define        add_video_randomness(d) enqueue_randomness(RND_SRC_VIDEO, (int)(d))
        !            85:
        !            86: void enqueue_randomness(int, int);
        !            87: void get_random_bytes(void *, size_t);
        !            88: void arc4random_bytes(void *, size_t);
        !            89: u_int32_t arc4random(void);
        !            90:
        !            91: #endif /* _KERNEL */
        !            92:
        !            93: #endif /* __RNDVAR_H__ */