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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
package p2p
import (
"crypto/rand"
"encoding/hex"
"fmt"
"io"
"os"
"strings"
"github.com/libp2p/go-libp2p/core/crypto"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/urfave/cli/v2"
)
func Priv2PeerID(r io.Reader) (string, error) {
b, err := readHexData(r)
if err != nil {
return "", err
}
p, err := crypto.UnmarshalSecp256k1PrivateKey(b)
if err != nil {
return "", fmt.Errorf("failed to parse priv key from %d bytes: %w", len(b), err)
}
pid, err := peer.IDFromPrivateKey(p)
if err != nil {
return "", fmt.Errorf("failed to parse peer ID from private key: %w", err)
}
return pid.String(), nil
}
func Pub2PeerID(r io.Reader) (string, error) {
b, err := readHexData(r)
if err != nil {
return "", err
}
p, err := crypto.UnmarshalSecp256k1PublicKey(b)
if err != nil {
return "", fmt.Errorf("failed to parse pub key from %d bytes: %w", len(b), err)
}
pid, err := peer.IDFromPublicKey(p)
if err != nil {
return "", fmt.Errorf("failed to parse peer ID from public key: %w", err)
}
return pid.String(), nil
}
func readHexData(r io.Reader) ([]byte, error) {
data, err := io.ReadAll(r)
if err != nil {
return nil, err
}
rawStr := strings.TrimSpace(string(data))
rawStr = strings.TrimPrefix(rawStr, "0x")
b, err := hex.DecodeString(rawStr)
if err != nil {
return nil, fmt.Errorf("p2p key is not formatted in hex chars: %w", err)
}
return b, nil
}
var Subcommands = cli.Commands{
{
Name: "priv2id",
Usage: "Reads a private key from STDIN, and returns a peer ID",
Action: func(ctx *cli.Context) error {
key, err := Priv2PeerID(os.Stdin)
if err != nil {
return err
}
fmt.Println(key)
return nil
},
},
{
Name: "pub2id",
Usage: "Reads a public key from STDIN, and returns a peer ID",
Action: func(ctx *cli.Context) error {
key, err := Pub2PeerID(os.Stdin)
if err != nil {
return err
}
fmt.Println(key)
return nil
},
},
{
Name: "genkey",
Usage: "Generates a private key",
Action: func(ctx *cli.Context) error {
buf := make([]byte, 32)
if _, err := rand.Read(buf); err != nil {
return fmt.Errorf("failed to get entropy: %w", err)
}
fmt.Println(hex.EncodeToString(buf))
return nil
},
},
}