4 This file is part of polypaudio.
6 polypaudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 polypaudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with polypaudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
34 #include <polypcore/core-util.h>
35 #include <polypcore/log.h>
39 static int has_whined = 0;
41 static const char *devices[] = { "/dev/urandom", "/dev/random", NULL };
43 static int random_proper(void *ret_data, size_t length) {
45 assert(ret_data && length);
49 #else /* OS_IS_WIN32 */
55 assert(ret_data && length);
62 if ((fd = open(*device, O_RDONLY)) >= 0) {
64 if ((r = pa_loop_read(fd, ret_data, length)) < 0 || (size_t) r != length)
76 #endif /* OS_IS_WIN32 */
79 void pa_random_seed(void) {
82 if (random_proper(&seed, sizeof(unsigned int)) < 0) {
84 pa_log_warn(__FILE__": failed to get proper entropy. Falling back to seeding with current time.");
87 seed = (unsigned int) time(NULL);
93 void pa_random(void *ret_data, size_t length) {
97 assert(ret_data && length);
99 if (random_proper(ret_data, length) >= 0)
103 pa_log_warn(__FILE__": failed to get proper entropy. Falling back to unsecure pseudo RNG.");
106 for (p = ret_data, l = length; l > 0; p++, l--)
107 *p = (uint8_t) rand();