2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2015 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/>.
37 // Call external program/script.
38 // You have to specify path to it and (inteface name as a rule) something
39 // that will be the first argument when calling it. Function will return
40 // it's output and possible error.
41 func ScriptCall(path, ifaceName string) ([]byte, error) {
45 if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
48 out, err := exec.Command(path, ifaceName).CombinedOutput()
50 log.Println("Script error", path, err, string(out))
55 // Read authentication key from the file.
56 // Key is 64 hexadecimal chars long.
57 func KeyRead(path string) *[KeySize]byte {
58 keyData, err := ioutil.ReadFile(path)
60 panic("Unable to read keyfile: " + err.Error())
62 if len(keyData) < 64 {
63 panic("Key must be 64 hex characters long")
65 keyDecoded, err := hex.DecodeString(string(keyData[0:64]))
67 panic("Unable to decode the key: " + err.Error())
69 key := new([KeySize]byte)
70 copy(key[:], keyDecoded)
75 func sliceZero(data []byte) {
76 for i := 0; i < len(data); i++ {
81 func VersionGet() string {
82 return "GoVPN version " + Version + " built with " + runtime.Version()