2 * Copyright (c) 2013 Arthur Mesh <arthurmesh@gmail.com>
3 * Copyright (c) 2013 Mark R V Murray
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #ifndef SYS_DEV_RANDOM_LIVE_ENTROPY_SOURCES_H_INCLUDED
31 #define SYS_DEV_RANDOM_LIVE_ENTROPY_SOURCES_H_INCLUDED
33 typedef u_int random_live_read_func_t(void *, u_int);
36 * Live entropy source is a source of entropy that can provide
37 * specified or approximate amount of entropy immediately upon request or within
38 * an acceptable amount of time.
40 struct live_entropy_source {
41 const char *les_ident;
42 enum random_entropy_source les_source;
43 random_live_read_func_t *les_read;
46 struct live_entropy_sources {
47 LIST_ENTRY(live_entropy_sources) lles_entries; /* list of providers */
48 struct live_entropy_source *lles_rsource; /* associated random adaptor */
51 extern struct mtx live_mtx;
53 void live_entropy_sources_init(void);
54 void live_entropy_sources_deinit(void);
55 void live_entropy_source_register(struct live_entropy_source *);
56 void live_entropy_source_deregister(struct live_entropy_source *);
57 void live_entropy_sources_feed(void);
59 #endif /* SYS_DEV_RANDOM_LIVE_ENTROPY_SOURCES_H_INCLUDED */