1 files changed, 53 insertions, 0 deletions
diff --git a/src/salt.cc b/src/salt.cc
new file mode 100644
index 0000000..46eb94a
--- /dev/null
+++ b/src/salt.cc
@@ -0,0 +1,53 @@
+/* -*- 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;
+}