blob: 46eb94a464a4dad3d5a40673980287669decaa30 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
* salt.cc
*
* Sun Jul 5 14:34:25 CEST 2020
* Copyright 2020 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Munia.
*
* Munia 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 2 of the License, or
* (at your option) any later version.
*
* Munia 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 Munia; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "salt.h"
#define _GNU_SOURCE 1
#include <linux/random.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
//#include <errno.h>
Salt getSalt()
{
Salt salt(16, '\0');
auto ret = syscall(SYS_getrandom, salt.data(), salt.size(), 1);
if(ret == -1)
{
throw "Could not get random bytes for salt"; // strerror(errno));
}
if(ret != (int)salt.size())
{
throw "Not enough entropy.";
}
return salt;
}
|
