github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/cmd/ethkey/inspect.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:27</date>
    10  //</624342589314699264>
    11  
    12  
    13  package main
    14  
    15  import (
    16  	"encoding/hex"
    17  	"fmt"
    18  	"io/ioutil"
    19  
    20  	"github.com/ethereum/go-ethereum/accounts/keystore"
    21  	"github.com/ethereum/go-ethereum/cmd/utils"
    22  	"github.com/ethereum/go-ethereum/crypto"
    23  	"gopkg.in/urfave/cli.v1"
    24  )
    25  
    26  type outputInspect struct {
    27  	Address    string
    28  	PublicKey  string
    29  	PrivateKey string
    30  }
    31  
    32  var commandInspect = cli.Command{
    33  	Name:      "inspect",
    34  	Usage:     "inspect a keyfile",
    35  	ArgsUsage: "<keyfile>",
    36  	Description: `
    37  Print various information about the keyfile.
    38  
    39  Private key information can be printed by using the --private flag;
    40  make sure to use this feature with great caution!`,
    41  	Flags: []cli.Flag{
    42  		passphraseFlag,
    43  		jsonFlag,
    44  		cli.BoolFlag{
    45  			Name:  "private",
    46  			Usage: "include the private key in the output",
    47  		},
    48  	},
    49  	Action: func(ctx *cli.Context) error {
    50  		keyfilepath := ctx.Args().First()
    51  
    52  //从文件中读取密钥。
    53  		keyjson, err := ioutil.ReadFile(keyfilepath)
    54  		if err != nil {
    55  			utils.Fatalf("Failed to read the keyfile at '%s': %v", keyfilepath, err)
    56  		}
    57  
    58  //用密码短语解密密钥。
    59  		passphrase := getPassphrase(ctx)
    60  		key, err := keystore.DecryptKey(keyjson, passphrase)
    61  		if err != nil {
    62  			utils.Fatalf("Error decrypting key: %v", err)
    63  		}
    64  
    65  //输出我们能检索到的所有相关信息。
    66  		showPrivate := ctx.Bool("private")
    67  		out := outputInspect{
    68  			Address: key.Address.Hex(),
    69  			PublicKey: hex.EncodeToString(
    70  				crypto.FromECDSAPub(&key.PrivateKey.PublicKey)),
    71  		}
    72  		if showPrivate {
    73  			out.PrivateKey = hex.EncodeToString(crypto.FromECDSA(key.PrivateKey))
    74  		}
    75  
    76  		if ctx.Bool(jsonFlag.Name) {
    77  			mustPrintJSON(out)
    78  		} else {
    79  			fmt.Println("Address:       ", out.Address)
    80  			fmt.Println("Public key:    ", out.PublicKey)
    81  			if showPrivate {
    82  				fmt.Println("Private key:   ", out.PrivateKey)
    83  			}
    84  		}
    85  		return nil
    86  	},
    87  }
    88