github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/cmd/ethkey/changepassword.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package main
    19  
    20  import (
    21  	"fmt"
    22  	"io/ioutil"
    23  	"strings"
    24  
    25  	"github.com/AigarNetwork/aigar/accounts/keystore"
    26  	"github.com/AigarNetwork/aigar/cmd/utils"
    27  	"gopkg.in/urfave/cli.v1"
    28  )
    29  
    30  var newPassphraseFlag = cli.StringFlag{
    31  	Name:  "newpasswordfile",
    32  	Usage: "the file that contains the new password for the keyfile",
    33  }
    34  
    35  var commandChangePassphrase = cli.Command{
    36  	Name:      "changepassword",
    37  	Usage:     "change the password on a keyfile",
    38  	ArgsUsage: "<keyfile>",
    39  	Description: `
    40  Change the password of a keyfile.`,
    41  	Flags: []cli.Flag{
    42  		passphraseFlag,
    43  		newPassphraseFlag,
    44  	},
    45  	Action: func(ctx *cli.Context) error {
    46  		keyfilepath := ctx.Args().First()
    47  
    48  		// Read key from file.
    49  		keyjson, err := ioutil.ReadFile(keyfilepath)
    50  		if err != nil {
    51  			utils.Fatalf("Failed to read the keyfile at '%s': %v", keyfilepath, err)
    52  		}
    53  
    54  		// Decrypt key with passphrase.
    55  		passphrase := getPassphrase(ctx)
    56  		key, err := keystore.DecryptKey(keyjson, passphrase)
    57  		if err != nil {
    58  			utils.Fatalf("Error decrypting key: %v", err)
    59  		}
    60  
    61  		// Get a new passphrase.
    62  		fmt.Println("Please provide a new password")
    63  		var newPhrase string
    64  		if passFile := ctx.String(newPassphraseFlag.Name); passFile != "" {
    65  			content, err := ioutil.ReadFile(passFile)
    66  			if err != nil {
    67  				utils.Fatalf("Failed to read new password file '%s': %v", passFile, err)
    68  			}
    69  			newPhrase = strings.TrimRight(string(content), "\r\n")
    70  		} else {
    71  			newPhrase = promptPassphrase(true)
    72  		}
    73  
    74  		// Encrypt the key with the new passphrase.
    75  		newJson, err := keystore.EncryptKey(key, newPhrase, keystore.StandardScryptN, keystore.StandardScryptP)
    76  		if err != nil {
    77  			utils.Fatalf("Error encrypting with new password: %v", err)
    78  		}
    79  
    80  		// Then write the new keyfile in place of the old one.
    81  		if err := ioutil.WriteFile(keyfilepath, newJson, 600); err != nil {
    82  			utils.Fatalf("Error writing new keyfile to disk: %v", err)
    83  		}
    84  
    85  		// Don't print anything.  Just return successfully,
    86  		// producing a positive exit code.
    87  		return nil
    88  	},
    89  }