github.com/alexdevranger/node-1.8.27@v0.0.0-20221128213301-aa5841e41d2d/cmd/ethkey/generate.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of go-dubxcoin.
     3  //
     4  // go-dubxcoin is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // go-dubxcoin is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU General Public License
    15  // along with go-dubxcoin. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package main
    18  
    19  import (
    20  	"crypto/ecdsa"
    21  	"fmt"
    22  	"io/ioutil"
    23  	"os"
    24  	"path/filepath"
    25  
    26  	"github.com/alexdevranger/node-1.8.27/accounts/keystore"
    27  	"github.com/alexdevranger/node-1.8.27/cmd/utils"
    28  	"github.com/alexdevranger/node-1.8.27/crypto"
    29  	"github.com/pborman/uuid"
    30  	"gopkg.in/urfave/cli.v1"
    31  )
    32  
    33  type outputGenerate struct {
    34  	Address      string
    35  	AddressEIP55 string
    36  }
    37  
    38  var commandGenerate = cli.Command{
    39  	Name:      "generate",
    40  	Usage:     "generate new keyfile",
    41  	ArgsUsage: "[ <keyfile> ]",
    42  	Description: `
    43  Generate a new keyfile.
    44  
    45  If you want to encrypt an existing private key, it can be specified by setting
    46  --privatekey with the location of the file containing the private key.
    47  `,
    48  	Flags: []cli.Flag{
    49  		passphraseFlag,
    50  		jsonFlag,
    51  		cli.StringFlag{
    52  			Name:  "privatekey",
    53  			Usage: "file containing a raw private key to encrypt",
    54  		},
    55  	},
    56  	Action: func(ctx *cli.Context) error {
    57  		// Check if keyfile path given and make sure it doesn't already exist.
    58  		keyfilepath := ctx.Args().First()
    59  		if keyfilepath == "" {
    60  			keyfilepath = defaultKeyfileName
    61  		}
    62  		if _, err := os.Stat(keyfilepath); err == nil {
    63  			utils.Fatalf("Keyfile already exists at %s.", keyfilepath)
    64  		} else if !os.IsNotExist(err) {
    65  			utils.Fatalf("Error checking if keyfile exists: %v", err)
    66  		}
    67  
    68  		var privateKey *ecdsa.PrivateKey
    69  		var err error
    70  		if file := ctx.String("privatekey"); file != "" {
    71  			// Load private key from file.
    72  			privateKey, err = crypto.LoadECDSA(file)
    73  			if err != nil {
    74  				utils.Fatalf("Can't load private key: %v", err)
    75  			}
    76  		} else {
    77  			// If not loaded, generate random.
    78  			privateKey, err = crypto.GenerateKey()
    79  			if err != nil {
    80  				utils.Fatalf("Failed to generate random private key: %v", err)
    81  			}
    82  		}
    83  
    84  		// Create the keyfile object with a random UUID.
    85  		id := uuid.NewRandom()
    86  		key := &keystore.Key{
    87  			Id:         id,
    88  			Address:    crypto.PubkeyToAddress(privateKey.PublicKey),
    89  			PrivateKey: privateKey,
    90  		}
    91  
    92  		// Encrypt key with passphrase.
    93  		passphrase := promptPassphrase(true)
    94  		keyjson, err := keystore.EncryptKey(key, passphrase, keystore.StandardScryptN, keystore.StandardScryptP)
    95  		if err != nil {
    96  			utils.Fatalf("Error encrypting key: %v", err)
    97  		}
    98  
    99  		// Store the file to disk.
   100  		if err := os.MkdirAll(filepath.Dir(keyfilepath), 0700); err != nil {
   101  			utils.Fatalf("Could not create directory %s", filepath.Dir(keyfilepath))
   102  		}
   103  		if err := ioutil.WriteFile(keyfilepath, keyjson, 0600); err != nil {
   104  			utils.Fatalf("Failed to write keyfile to %s: %v", keyfilepath, err)
   105  		}
   106  
   107  		// Output some information.
   108  		out := outputGenerate{
   109  			Address: key.Address.Hex(),
   110  		}
   111  		if ctx.Bool(jsonFlag.Name) {
   112  			mustPrintJSON(out)
   113  		} else {
   114  			fmt.Println("Address:", out.Address)
   115  		}
   116  		return nil
   117  	},
   118  }