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/>.
36 // Call external program/script.
37 // You have to specify path to it and (inteface name as a rule) something
38 // that will be the first argument when calling it. Function will return
39 // it's output and possible error.
40 func ScriptCall(path, ifaceName string) ([]byte, error) {
44 if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
47 out, err := exec.Command(path, ifaceName).CombinedOutput()
49 log.Println("Script error", path, err, string(out))
54 // Read authentication key from the file.
55 // Key is 64 hexadecimal chars long.
56 func KeyRead(path string) *[KeySize]byte {
57 keyData, err := ioutil.ReadFile(path)
59 panic("Unable to read keyfile: " + err.Error())
61 if len(keyData) < 64 {
62 panic("Key must be 64 hex characters long")
64 keyDecoded, err := hex.DecodeString(string(keyData[0:64]))
66 panic("Unable to decode the key: " + err.Error())
68 key := new([KeySize]byte)
69 copy(key[:], keyDecoded)
74 func sliceZero(data []byte) {
75 for i := 0; i < len(data); i++ {