github.com/ethereumproject/go-ethereum@v5.5.2+incompatible/cmd/geth/accountcmd.go

// Copyright 2016 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"
	"log"
	"os"

	"github.com/ethereumproject/go-ethereum/accounts"
	"github.com/ethereumproject/go-ethereum/console"
	"github.com/ethereumproject/go-ethereum/crypto"
	"github.com/ethereumproject/go-ethereum/logger"
	"github.com/ethereumproject/go-ethereum/logger/glog"
	"gopkg.in/urfave/cli.v1"
)

var (
	AccountsIndexFlag = cli.BoolFlag{
		Name:  "index-accounts,indexaccounts",
		Usage: "Enable key-value db store for indexing large amounts of key files",
	}
	walletCommand = cli.Command{
		Name:  "wallet",
		Usage: "Ethereum presale wallet",
		Subcommands: []cli.Command{
			{
				Action: importWallet,
				Name:   "import",
				Usage:  "import ethereum presale wallet",
			},
		},
		Description: `

geth wallet import /path/to/my/presale.wallet

	Will prompt for your password and imports your ether presale account.
	It can be used non-interactively with the --password option taking a
	passwordfile as argument containing the wallet password in plaintext.

	`}
	accountCommand = cli.Command{
		Action: accountMan,
		Name:   "account",
		Usage:  "Manage accounts",
		Description: `

	Manage accounts lets you create new accounts, list all existing accounts,
	import a private key into a new account.

	'$ geth account <command> --help' shows help for any subcommand.

	It supports interactive mode, when you are prompted for password as well as
	non-interactive mode where passwords are supplied via a given password file.
	Non-interactive mode is only meant for scripted use on test networks or known
	safe environments.

	Make sure you remember the password you gave when creating a new account (with
	either new or import). Without it you are not able to unlock your account.

	Note that exporting your key in unencrypted format is NOT supported.

	Keys are stored under <DATADIR>/<CHAINDIR>/keystore.
	It is safe to transfer the entire directory or the individual keys therein
	between ethereum nodes by simply copying.
	Make sure you backup your keys regularly.

	In order to use your account to send transactions, you need to unlock them using
	the '--unlock' option. The argument is a space separated list of addresses or
	indexes. If used non-interactively with a passwordfile, the file should contain
	the respective passwords one per line. If you unlock n accounts and the password
	file contains less than n entries, then the last password is meant to apply to
	all remaining accounts.

	And finally. DO NOT FORGET YOUR PASSWORD.
		`,
		Subcommands: []cli.Command{
			{
				Action: accountList,
				Name:   "list",
				Usage:  "Print account addresses",
				Description: `
geth account list

	Lists all accounts found in geth's keystore.
	Accounts are listed as below:

		Account #0: {7fa65f0395f5ee0bcbae969d711823ab4353beae} /Users/ia/Library/EthereumClassic/mainnet/keystore/UTC--2017-10-31T13-53-59.993482857Z--7fa65f0395f5ee0bcbae969d711823ab4353beae
		Account #1: {b5c694a4cdbc1820ba4ee8fd6f5ab71a25782534} /Users/ia/Library/EthereumClassic/mainnet/keystore/my_other_key
				`,
			},
			{
				Action: accountCreate,
				Name:   "new",
				Usage:  "Create a new account",
				Description: `

geth account new

	Creates a new account. Prints the address.
	The account is saved in encrypted format, you are prompted for a passphrase.

	You must remember this passphrase to unlock your account in the future.

	For non-interactive use the passphrase can be specified with the --password flag:

		geth --password <passwordfile> account new

	Note, this is meant to be used for testing only, it is a bad idea to save your
	password to file or expose in any other way.
				`,
			},
			{
				Action: accountUpdate,
				Name:   "update",
				Usage:  "Update an existing account",
				Description: `

geth account update <address>

	Update an existing account.
	The account is saved in the newest version in encrypted format, you are prompted
	for a passphrase to unlock the account and another to save the updated file.
	This same command can therefore be used to migrate an account of a deprecated
	format to the newest format or change the password for an account.

	For non-interactive use the passphrase can be specified with the --password flag:

		geth --password <passwordfile> account update <address>

	Since only one password can be given, only format update can be performed,
	changing your password is only possible interactively.
				`,
			},
			{
				Action: accountImport,
				Name:   "import",
				Usage:  "Import a private key into a new account",
				Description: `

geth account import <keyfile>

	Imports an unencrypted private key from <keyfile> and creates a new account.
	Prints the address.

	The keyfile is assumed to contain an unencrypted private key in hexadecimal format.
	The account is saved in encrypted format, you are prompted for a passphrase.

	You must remember this passphrase to unlock your account in the future.

	For non-interactive use the passphrase can be specified with the -password flag:

		geth --password <passwordfile> account import <keyfile>

	Note:
	As you can directly copy your encrypted accounts to another ethereum instance,
	this import mechanism is not needed when you transfer an account between
	nodes.
				`,
			},
			{
				Action: accountIndex,
				Name:   "index",
				Usage:  "Build persistent account index",
				Description: `

geth account index

	Create keystore directory index cache database (keystore/accounts.db),
	which is relevant for use with large amounts of key files (>10,000).

	While idempotent, this command is only intended to handle the work of initial index creation.
	Therefore, it is only useful to run once, when it's your first time using '--index-accounts' flag option,
	and MUST be run in conjunction with that flag.

	It non-recursively indexes all valid key files from keystore/*
		`,
			},
		},
	}
)

func accountIndex(ctx *cli.Context) error {
	n := aliasableName(AccountsIndexFlag.Name, ctx)
	if !ctx.GlobalBool(n) {
		if e := ctx.GlobalSet(n, "true"); e != nil {
			log.Fatal("err set flag", e)
		}
	}
	am := MakeAccountManager(ctx)
	errs := am.BuildIndexDB()
	if len(errs) > 0 {
		for _, e := range errs {
			if e != nil {
				glog.V(logger.Error).Errorf("init cache db err: %v", e)
			}
		}
	}
	return nil
}

func accountMan(ctx *cli.Context) error {
	return cli.ShowSubcommandHelp(ctx)
}

func accountList(ctx *cli.Context) error {
	accman := MakeAccountManager(ctx)
	for i, acct := range accman.Accounts() {

		fmt.Printf("Account #%d: {%x} %s\n", i, acct.Address, acct.File)
	}
	return nil
}

// tries unlocking the specified account a few times.
func unlockAccount(ctx *cli.Context, accman *accounts.Manager, address string, i int, passwords []string) (accounts.Account, string) {
	account, err := MakeAddress(accman, address)
	if err != nil {
		log.Fatal("Could not list accounts: ", err)
	}
	for trials := 0; trials < 3; trials++ {
		prompt := fmt.Sprintf("Unlocking account %s | Attempt %d/%d", address, trials+1, 3)
		password := getPassPhrase(prompt, false, i, passwords)
		err = accman.Unlock(account, password)
		if err == nil {
			glog.V(logger.Info).Infof("Unlocked account %x", account.Address)
			glog.D(logger.Error).Infof("Unlocked account %x", account.Address)
			return account, password
		}
		if err, ok := err.(*accounts.AmbiguousAddrError); ok {
			glog.V(logger.Info).Infof("Unlocked account %x", account.Address)
			glog.D(logger.Error).Infof("Unlocked account %x", account.Address)
			return ambiguousAddrRecovery(accman, err, password), password
		}
		if err != accounts.ErrDecrypt {
			// No need to prompt again if the error is not decryption-related.
			break
		}
	}
	// All trials expended to unlock account, bail out
	log.Fatalf("Failed to unlock account %s (%v)", address, err)
	return accounts.Account{}, ""
}

// getPassPhrase retrieves the passwor associated with an account, either fetched
// from a list of preloaded passphrases, or requested interactively from the user.
func getPassPhrase(prompt string, confirmation bool, i int, passwords []string) string {
	// If a list of passwords was supplied, retrieve from them
	if len(passwords) > 0 {
		if i < len(passwords) {
			return passwords[i]
		}
		return passwords[len(passwords)-1]
	}
	// Otherwise prompt the user for the password
	if prompt != "" {
		fmt.Println(prompt)
	}
	password, err := console.Stdin.PromptPassword("Passphrase: ")
	if err != nil {
		log.Fatal("Failed to read passphrase: ", err)
	}
	if confirmation {
		confirm, err := console.Stdin.PromptPassword("Repeat passphrase: ")
		if err != nil {
			log.Fatal("Failed to read passphrase confirmation: ", err)
		}
		if password != confirm {
			log.Fatal("Passphrases do not match")
		}
	}
	return password
}

func ambiguousAddrRecovery(am *accounts.Manager, err *accounts.AmbiguousAddrError, auth string) accounts.Account {
	fmt.Printf("Multiple key files exist for address %x:\n", err.Addr)
	for _, a := range err.Matches {
		fmt.Println("  ", a.File)
	}
	fmt.Println("Testing your passphrase against all of them...")
	var match *accounts.Account
	for _, a := range err.Matches {
		if err := am.Unlock(a, auth); err == nil {
			match = &a
			break
		}
	}
	if match == nil {
		log.Fatal("None of the listed files could be unlocked.")
	}
	fmt.Printf("Your passphrase unlocked %s\n", match.File)
	fmt.Println("In order to avoid this warning, you need to remove the following duplicate key files:")
	for _, a := range err.Matches {
		if a != *match {
			fmt.Println("  ", a.File)
		}
	}
	return *match
}

// accountCreate creates a new account into the keystore defined by the CLI flags.
func accountCreate(ctx *cli.Context) error {
	accman := MakeAccountManager(ctx)
	password := getPassPhrase("Your new account is locked with a password. Please give a password. Do not forget this password.", true, 0, MakePasswordList(ctx))

	account, err := accman.NewAccount(password)
	if err != nil {
		log.Fatal("Failed to create account: ", err)
	}
	fmt.Printf("Address: {%x}\n", account.Address)
	return nil
}

// accountUpdate transitions an account from a previous format to the current
// one, also providing the possibility to change the pass-phrase.
func accountUpdate(ctx *cli.Context) error {
	if len(ctx.Args()) == 0 {
		log.Fatal("No accounts specified to update")
	}
	accman := MakeAccountManager(ctx)

	account, oldPassword := unlockAccount(ctx, accman, ctx.Args().First(), 0, nil)
	newPassword := getPassPhrase("Please give a new password. Do not forget this password.", true, 0, nil)
	if err := accman.Update(account, oldPassword, newPassword); err != nil {
		log.Fatal("Could not update the account: ", err)
	}
	return nil
}

func importWallet(ctx *cli.Context) error {
	keyfile := ctx.Args().First()
	if len(keyfile) == 0 {
		log.Fatal("keyfile must be given as argument")
	}
	keyJson, err := ioutil.ReadFile(keyfile)
	if err != nil {
		log.Fatal("Could not read wallet file: ", err)
	}
	accman := MakeAccountManager(ctx)
	passphrase := getPassPhrase("", false, 0, MakePasswordList(ctx))

	acct, err := accman.ImportPreSaleKey(keyJson, passphrase)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("Address: {%x}\n", acct.Address)
	return nil
}

func accountImport(ctx *cli.Context) error {
	keyfile := ctx.Args().First()
	if len(keyfile) == 0 {
		log.Fatal("keyfile must be given as argument")
	}
	f, err := os.Open(keyfile)
	if err != nil {
		log.Fatalf("could not open key file: %v", err)
	}
	key, err := crypto.LoadECDSA(f)
	if err != nil {
		log.Fatalf("unable to decode keyfile '%s': %v", keyfile, err)
	}
	err = f.Close()
	if err != nil {
		log.Fatalf("could not close key file: %v", err)
	}
	accman := MakeAccountManager(ctx)
	passphrase := getPassPhrase("Your new account is locked with a password. Please give a password. Do not forget this password.", true, 0, MakePasswordList(ctx))
	acct, err := accman.ImportECDSA(key, passphrase)
	if err != nil {
		log.Fatal("Could not create the account: ", err)
	}
	fmt.Printf("Address: {%x}\n", acct.Address)
	return nil
}