2 * Copyright (c) 2000-2013 Mark R. V. Murray
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef _SYS_RANDOM_H_
30 #define _SYS_RANDOM_H_
34 int read_random(void *, int);
37 * Note: if you add or remove members of random_entropy_source, remember to also update the
38 * KASSERT regarding what valid members are in random_harvest_internal(), and remember the
39 * strings in the static array random_source_descr[] in random_harvestq.c.
41 * NOTE: complain loudly to markm@ or on the lists if this enum gets more than 32
42 * distinct values (0-31)! ENTROPYSOURCE may be == 32, but not > 32.
44 enum random_entropy_source {
47 /* Environmental sources */
57 RANDOM_ENVIRONMENTAL_END, /* This one is wasted */
58 /* High-quality HW RNGs from here on. */
70 void random_harvest(const void *, u_int, u_int, enum random_entropy_source);
74 #endif /* _SYS_RANDOM_H_ */