git-secure-export

 1package export
 2
 3import (
 4	"crypto/rand"
 5	"io"
 6	"os"
 7)
 8
 9const (
10	KeySize = 32
11)
12
13func CreateKey(path string) error {
14	var key [KeySize]byte
15	_, err := rand.Read(key[:])
16	if err != nil {
17		return err
18	}
19
20	file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
21	if err != nil {
22		return err
23	}
24	defer file.Close()
25
26	// Write and reset offset for read in ReadKey() function.
27	_, err = file.Write(key[:])
28	if err != nil {
29		return err
30	}
31
32	return nil
33}
34
35func ReadKey(path string) (*[KeySize]byte, error) {
36	file, err := os.Open(path)
37	if err != nil {
38		return nil, err
39	}
40	defer file.Close()
41
42	var key [KeySize]byte
43	_, err = io.ReadFull(file, key[:])
44	if err != nil {
45		return nil, err
46	}
47
48	return &key, nil
49}