164 lines
3.6 KiB
Go
164 lines
3.6 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"errors"
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"fmt"
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"net"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/enr"
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"github.com/urfave/cli/v2"
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)
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var (
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keyCommand = &cli.Command{
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Name: "key",
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Usage: "Operations on node keys",
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Subcommands: []*cli.Command{
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keyGenerateCommand,
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keyToIDCommand,
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keyToNodeCommand,
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keyToRecordCommand,
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},
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}
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keyGenerateCommand = &cli.Command{
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Name: "generate",
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Usage: "Generates node key files",
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ArgsUsage: "keyfile",
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Action: genkey,
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}
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keyToIDCommand = &cli.Command{
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Name: "to-id",
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Usage: "Creates a node ID from a node key file",
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ArgsUsage: "keyfile",
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Action: keyToID,
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Flags: []cli.Flag{},
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}
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keyToNodeCommand = &cli.Command{
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Name: "to-enode",
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Usage: "Creates an enode URL from a node key file",
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ArgsUsage: "keyfile",
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Action: keyToURL,
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Flags: []cli.Flag{hostFlag, tcpPortFlag, udpPortFlag},
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}
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keyToRecordCommand = &cli.Command{
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Name: "to-enr",
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Usage: "Creates an ENR from a node key file",
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ArgsUsage: "keyfile",
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Action: keyToRecord,
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Flags: []cli.Flag{hostFlag, tcpPortFlag, udpPortFlag},
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}
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)
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var (
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hostFlag = &cli.StringFlag{
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Name: "ip",
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Usage: "IP address of the node",
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Value: "127.0.0.1",
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}
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tcpPortFlag = &cli.IntFlag{
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Name: "tcp",
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Usage: "TCP port of the node",
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Value: 30303,
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}
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udpPortFlag = &cli.IntFlag{
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Name: "udp",
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Usage: "UDP port of the node",
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Value: 30303,
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}
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)
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func genkey(ctx *cli.Context) error {
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if ctx.NArg() != 1 {
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return errors.New("need key file as argument")
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}
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file := ctx.Args().Get(0)
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key, err := crypto.GenerateKey()
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if err != nil {
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return fmt.Errorf("could not generate key: %v", err)
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}
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return crypto.SaveECDSA(file, key)
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}
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func keyToID(ctx *cli.Context) error {
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n, err := makeRecord(ctx)
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if err != nil {
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return err
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}
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fmt.Println(n.ID())
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return nil
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}
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func keyToURL(ctx *cli.Context) error {
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n, err := makeRecord(ctx)
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if err != nil {
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return err
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}
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fmt.Println(n.URLv4())
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return nil
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}
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func keyToRecord(ctx *cli.Context) error {
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n, err := makeRecord(ctx)
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if err != nil {
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return err
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}
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fmt.Println(n.String())
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return nil
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}
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func makeRecord(ctx *cli.Context) (*enode.Node, error) {
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if ctx.NArg() != 1 {
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return nil, errors.New("need key file as argument")
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}
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var (
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file = ctx.Args().Get(0)
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host = ctx.String(hostFlag.Name)
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tcp = ctx.Int(tcpPortFlag.Name)
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udp = ctx.Int(udpPortFlag.Name)
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)
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key, err := crypto.LoadECDSA(file)
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if err != nil {
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return nil, err
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}
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var r enr.Record
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if host != "" {
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ip := net.ParseIP(host)
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if ip == nil {
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return nil, fmt.Errorf("invalid IP address %q", host)
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}
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r.Set(enr.IP(ip))
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}
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if udp != 0 {
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r.Set(enr.UDP(udp))
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}
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if tcp != 0 {
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r.Set(enr.TCP(tcp))
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}
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if err := enode.SignV4(&r, key); err != nil {
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return nil, err
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}
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return enode.New(enode.ValidSchemes, &r)
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}
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