2 * Copyright (c) 2006 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 get_device_fd(int flags)
55 static const char *rnd_devices[] = {
64 for(p = rnd_devices; *p; p++) {
65 int fd = open(*p, flags | O_NDELAY);
75 unix_seed(const void *indata, int size)
82 fd = get_device_fd(O_WRONLY);
86 write(fd, indata, size);
92 unix_bytes(unsigned char *outdata, int size)
100 fd = get_device_fd(O_RDONLY);
105 count = read (fd, outdata, size);
106 if (count < 0 && errno == EINTR)
108 else if (count <= 0) {
126 unix_add(const void *indata, int size, double entropi)
128 unix_seed(indata, size);
132 unix_pseudorand(unsigned char *outdata, int size)
134 return unix_bytes(outdata, size);
142 fd = get_device_fd(O_RDONLY);
150 const RAND_METHOD hc_rand_unix_method = {
160 RAND_unix_method(void)
162 return &hc_rand_unix_method;