plugeth/cmd/ethkey/changepassword.go
Binacs dd91c7ce6a
cmd: abstract getPassPhrase functions into one (#21219)
* [cmd] Abstract `getPassPhrase` functions into one.

* cmd/ethkey: fix compilation failure

Co-authored-by: rjl493456442 <garyrong0905@gmail.com>
2020-06-30 09:56:40 +02:00

89 lines
2.7 KiB
Go

// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"fmt"
"io/ioutil"
"strings"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/cmd/utils"
"gopkg.in/urfave/cli.v1"
)
var newPassphraseFlag = cli.StringFlag{
Name: "newpasswordfile",
Usage: "the file that contains the new password for the keyfile",
}
var commandChangePassphrase = cli.Command{
Name: "changepassword",
Usage: "change the password on a keyfile",
ArgsUsage: "<keyfile>",
Description: `
Change the password of a keyfile.`,
Flags: []cli.Flag{
passphraseFlag,
newPassphraseFlag,
},
Action: func(ctx *cli.Context) error {
keyfilepath := ctx.Args().First()
// Read key from file.
keyjson, err := ioutil.ReadFile(keyfilepath)
if err != nil {
utils.Fatalf("Failed to read the keyfile at '%s': %v", keyfilepath, err)
}
// Decrypt key with passphrase.
passphrase := getPassphrase(ctx, false)
key, err := keystore.DecryptKey(keyjson, passphrase)
if err != nil {
utils.Fatalf("Error decrypting key: %v", err)
}
// Get a new passphrase.
fmt.Println("Please provide a new password")
var newPhrase string
if passFile := ctx.String(newPassphraseFlag.Name); passFile != "" {
content, err := ioutil.ReadFile(passFile)
if err != nil {
utils.Fatalf("Failed to read new password file '%s': %v", passFile, err)
}
newPhrase = strings.TrimRight(string(content), "\r\n")
} else {
newPhrase = utils.GetPassPhrase("", true)
}
// Encrypt the key with the new passphrase.
newJson, err := keystore.EncryptKey(key, newPhrase, keystore.StandardScryptN, keystore.StandardScryptP)
if err != nil {
utils.Fatalf("Error encrypting with new password: %v", err)
}
// Then write the new keyfile in place of the old one.
if err := ioutil.WriteFile(keyfilepath, newJson, 0600); err != nil {
utils.Fatalf("Error writing new keyfile to disk: %v", err)
}
// Don't print anything. Just return successfully,
// producing a positive exit code.
return nil
},
}