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
34 * Live entropy source is a source of entropy that can provide
35 * specified or approximate amount of entropy immediately upon request or within
36 * an acceptable amount of time.
38 struct live_entropy_sources {
39 LIST_ENTRY(live_entropy_sources) entries; /* list of providers */
40 struct random_hardware_source *rsource; /* associated random adaptor */
43 extern struct mtx live_mtx;
45 void live_entropy_source_register(struct random_hardware_source *);
46 void live_entropy_source_deregister(struct random_hardware_source *);
47 void live_entropy_sources_feed(int, event_proc_f);
49 #define LIVE_ENTROPY_SRC_MODULE(name, modevent, ver) \
50 static moduledata_t name##_mod = { \
55 DECLARE_MODULE(name, name##_mod, SI_SUB_RANDOM, \
57 MODULE_VERSION(name, ver); \
58 MODULE_DEPEND(name, random, 1, 1, 1);
60 #endif /* SYS_DEV_RANDOM_LIVE_ENTROPY_SOURCES_H_INCLUDED */