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/*
Unix SMB/CIFS implementation.
Functions to create reasonable random numbers for crypto use.
Copyright (C) Jeremy Allison 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "system/filesys.h"
#include "lib/util/genrand.h"
#include "sys_rw_data.h"
#include "lib/util/blocking.h"
static int urand_fd = -1;
static void open_urandom(void)
{
if (urand_fd != -1) {
return;
}
urand_fd = open( "/dev/urandom", O_RDONLY,0);
if (urand_fd == -1) {
abort();
}
smb_set_close_on_exec(urand_fd);
}
_PUBLIC_ void generate_random_buffer(uint8_t *out, int len)
{
ssize_t rw_ret;
open_urandom();
rw_ret = read_data(urand_fd, out, len);
if (rw_ret != len) {
abort();
}
}
/*
* Keep generate_secret_buffer in case we ever want to do something
* different
*/
_PUBLIC_ void generate_secret_buffer(uint8_t *out, int len)
{
generate_random_buffer(out, len);
}
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