134 lines
3.7 KiB
Go
134 lines
3.7 KiB
Go
// Copyright 2017 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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"crypto/ecdsa"
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"fmt"
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"os"
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"path/filepath"
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"github.com/ethereum/go-ethereum/accounts/keystore"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/google/uuid"
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"gopkg.in/urfave/cli.v1"
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)
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type outputGenerate struct {
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Address string
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AddressEIP55 string
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}
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var (
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privateKeyFlag = cli.StringFlag{
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Name: "privatekey",
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Usage: "file containing a raw private key to encrypt",
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}
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lightKDFFlag = cli.BoolFlag{
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Name: "lightkdf",
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Usage: "use less secure scrypt parameters",
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}
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)
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var commandGenerate = cli.Command{
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Name: "generate",
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Usage: "generate new keyfile",
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ArgsUsage: "[ <keyfile> ]",
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Description: `
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Generate a new keyfile.
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If you want to encrypt an existing private key, it can be specified by setting
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--privatekey with the location of the file containing the private key.
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`,
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Flags: []cli.Flag{
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passphraseFlag,
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jsonFlag,
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privateKeyFlag,
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lightKDFFlag,
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},
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Action: func(ctx *cli.Context) error {
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// Check if keyfile path given and make sure it doesn't already exist.
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keyfilepath := ctx.Args().First()
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if keyfilepath == "" {
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keyfilepath = defaultKeyfileName
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}
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if _, err := os.Stat(keyfilepath); err == nil {
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utils.Fatalf("Keyfile already exists at %s.", keyfilepath)
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} else if !os.IsNotExist(err) {
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utils.Fatalf("Error checking if keyfile exists: %v", err)
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}
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var privateKey *ecdsa.PrivateKey
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var err error
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if file := ctx.String(privateKeyFlag.Name); file != "" {
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// Load private key from file.
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privateKey, err = crypto.LoadECDSA(file)
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if err != nil {
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utils.Fatalf("Can't load private key: %v", err)
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}
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} else {
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// If not loaded, generate random.
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privateKey, err = crypto.GenerateKey()
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if err != nil {
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utils.Fatalf("Failed to generate random private key: %v", err)
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}
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}
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// Create the keyfile object with a random UUID.
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UUID, err := uuid.NewRandom()
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if err != nil {
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utils.Fatalf("Failed to generate random uuid: %v", err)
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}
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key := &keystore.Key{
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Id: UUID,
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Address: crypto.PubkeyToAddress(privateKey.PublicKey),
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PrivateKey: privateKey,
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}
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// Encrypt key with passphrase.
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passphrase := getPassphrase(ctx, true)
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scryptN, scryptP := keystore.StandardScryptN, keystore.StandardScryptP
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if ctx.Bool(lightKDFFlag.Name) {
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scryptN, scryptP = keystore.LightScryptN, keystore.LightScryptP
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}
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keyjson, err := keystore.EncryptKey(key, passphrase, scryptN, scryptP)
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if err != nil {
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utils.Fatalf("Error encrypting key: %v", err)
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}
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// Store the file to disk.
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if err := os.MkdirAll(filepath.Dir(keyfilepath), 0700); err != nil {
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utils.Fatalf("Could not create directory %s", filepath.Dir(keyfilepath))
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}
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if err := os.WriteFile(keyfilepath, keyjson, 0600); err != nil {
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utils.Fatalf("Failed to write keyfile to %s: %v", keyfilepath, err)
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}
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// Output some information.
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out := outputGenerate{
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Address: key.Address.Hex(),
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}
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if ctx.Bool(jsonFlag.Name) {
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mustPrintJSON(out)
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} else {
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fmt.Println("Address:", out.Address)
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}
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return nil
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},
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}
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