1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* random.h -- A strong random number generator
*
* $FreeBSD$
*
* Version 0.95, last modified 18-Oct-95
*
* Copyright Theodore Ts'o, 1994, 1995. 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, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License, in which case the provisions of the GPL are
* required INSTEAD OF the above restrictions. (This clause is
* necessary due to a potential bad interaction between the GPL and
* the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED ``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.
*
*/
/*
* Many kernel routines will have a use for good random numbers,
* for example, for truely random TCP sequence numbers, which prevent
* certain forms of TCP spoofing attacks.
*
*/
#ifndef _MACHINE_RANDOM_H_
#define _MACHINE_RANDOM_H_
#include <sys/ioccom.h>
#define MEM_SETIRQ _IOW('r', 1, u_int16_t) /* set interrupt */
#define MEM_CLEARIRQ _IOW('r', 2, u_int16_t) /* clear interrupt */
#define MEM_RETURNIRQ _IOR('r', 3, u_int16_t) /* return interrupt */
#ifdef _KERNEL
/* Type of the cookie passed to add_interrupt_randomness. */
struct random_softc {
inthand2_t *sc_handler;
void *sc_arg;
int sc_intr;
};
/* Exported functions */
void rand_initialize(void);
void add_keyboard_randomness(u_char scancode);
inthand2_t add_interrupt_randomness;
#ifdef notused
void add_blkdev_randomness(int major);
#endif
#ifdef notused
void get_random_bytes(void *buf, u_int nbytes);
#endif
u_int read_random(void *buf, u_int size);
u_int read_random_unlimited(void *buf, u_int size);
#ifdef notused
u_int write_random(const char *buf, u_int nbytes);
#endif
int random_poll(dev_t dev, int events, struct proc *p);
#endif /* _KERNEL */
#endif /* !_MACHINE_RANDOM_H_ */
|
