2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2016 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 "github.com/Sirupsen/logrus"
27 "github.com/pkg/errors"
30 // Rand is a source of entropy
31 var Rand = rand.Reader
33 // EGDRand is a EGD (Entropy Gathering Daemon) source of entropy
36 // Read n bytes from EGD, blocking mode.
37 func (egdPath EGDRand) Read(b []byte) (int, error) {
38 conn, err := net.Dial("unix", string(egdPath))
40 return 0, errors.Wrapf(err, "net.Dial unix:%q", string(egdPath))
42 defer CloseLog(conn, logger, logrus.Fields{"func": logFuncPrefix + "EGDRand.Read"})
43 n, err := conn.Write([]byte{0x02, byte(len(b))})
45 return 0, errors.Wrapf(err, "conn.Write unix:%q", string(egdPath))
47 if n, err = io.ReadFull(conn, b); err != nil {
48 return 0, errors.Wrapf(err, wrapIoReadFull, string(egdPath))
53 // EGDInit sets random source to a EGD socket
54 func EGDInit(path string) {