forked from libp2p/go-libp2p-examples
/
key.go
69 lines (64 loc) · 1.29 KB
/
key.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
package helper
import (
"crypto/rand"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path"
ic "github.com/libp2p/go-libp2p-crypto"
"github.com/libp2p/go-libp2p-peer"
)
type MyID struct {
ID string `json:"id"`
PRV string `json:"prv"`
}
func GenKey(dir string) (ic.PrivKey, error) {
if dir == "" {
dir = "/tmp"
}
p := path.Join(dir, "myid")
os.Remove(p)
f, err := os.OpenFile(p, os.O_RDWR|os.O_CREATE, 0755)
if err != nil {
panic(err) // oh no!
}
priv, pub, err := ic.GenerateKeyPairWithReader(ic.RSA, 2048, rand.Reader)
pid, err := peer.IDFromPublicKey(pub)
if err != nil {
panic(err) // oh no!
}
prvb, _ := priv.Bytes()
prvs := base64.StdEncoding.EncodeToString(prvb)
id := pid.Pretty()
myid := &MyID{id, prvs}
jb, _ := json.Marshal(myid)
n, err := f.WriteString(string(jb))
fmt.Println(n, err)
return priv, nil
}
func LoadKey(dir string) (ic.PrivKey, error) {
if dir == "" {
dir = "/tmp"
}
p := path.Join(dir, "myid")
f, err := os.Open(p)
if err != nil {
return nil, err
}
buf, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
myid := &MyID{}
err = json.Unmarshal(buf, myid)
if err != nil {
return nil, err
}
pkb, err := base64.StdEncoding.DecodeString(myid.PRV)
if err != nil {
return nil, err
}
return ic.UnmarshalPrivateKey(pkb)
}