f0cfa1b168
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Commit these apart because compile testing doesn't guarantee I didn't made some nasty mistake. No functional change intended.
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2013 Arthur Mesh <arthurmesh@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/random.h>
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#include <sys/systm.h>
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#include <dev/random/randomdev.h>
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#include <dev/random/randomdev_soft.h>
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#include <dev/random/random_adaptors.h>
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#include <dev/random/live_entropy_sources.h>
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static void live_random_example_init(void);
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static void live_random_example_deinit(void);
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static u_int live_random_example_read(void *, u_int);
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struct random_adaptor live_random_example = {
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.les_ident = "Example RNG",
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.les_source = RANDOM_PURE_BOGUS, /* Make sure this is in
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* sys/random.h and is unique */
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.les_read = live_random_example_read,
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};
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/*
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* Used under the license provided @ http://xkcd.com/221/
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* http://creativecommons.org/licenses/by-nc/2.5/
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*/
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static uint8_t
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getRandomNumber(void)
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{
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return 4; /* chosen by fair dice roll, guaranteed to be random */
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}
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static void
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live_random_example_init(void)
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{
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/* Do initialisation stuff here */
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}
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static void
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live_random_example_deinit(void)
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{
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/* Do de-initialisation stuff here */
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}
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/* get <c> bytes of random stuff into <buf>. You may presume
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* that <c> is a multiple of 2^n, with n>=3. A typical value
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* is c=16.
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*/
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static u_int
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live_random_example_read(void *buf, u_int c)
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{
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uint8_t *b;
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int count;
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b = buf;
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for (count = 0; count < c; count++)
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b[count] = getRandomNumber();
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/* printf("returning %d bytes of pure randomness\n", c); */
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return (c);
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}
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/* ARGSUSED */
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static int
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live_random_example_modevent(module_t mod __unused, int type, void *unused __unused)
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{
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int error = 0;
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switch (type) {
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case MOD_LOAD:
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live_entropy_source_register(&live_random_example);
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break;
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case MOD_UNLOAD:
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live_entropy_source_deregister(&live_random_example);
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break;
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case MOD_SHUTDOWN:
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break;
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default:
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error = EOPNOTSUPP;
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break;
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}
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return (error);
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}
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DEV_MODULE(live_random_example, live_random_example_modevent, NULL);
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MODULE_VERSION(live_random_example, 1);
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MODULE_DEPEND(live_random_example, randomdev, 1, 1, 1);
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