eeb53bc143
ethkey is a new tool that serves as a command line interface to the basic key management functionalities of geth. It currently supports: - generating keyfiles - inspecting keyfiles (print public and private key) - signing messages - verifying signed messages
118 lines
3.0 KiB
Go
118 lines
3.0 KiB
Go
package main
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import (
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"crypto/ecdsa"
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"crypto/rand"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/ethereum/go-ethereum/accounts/keystore"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/pborman/uuid"
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"gopkg.in/urfave/cli.v1"
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)
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type outputGenerate struct {
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Address string
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AddressEIP55 string
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}
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var commandGenerate = cli.Command{
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Name: "generate",
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Usage: "generate new keyfile",
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ArgsUsage: "[ <keyfile> ]",
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Description: `
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Generate a new keyfile.
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If you want to use an existing private key to use in the keyfile, it can be
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specified by setting --privatekey with the location of the file containing the
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private key.`,
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Flags: []cli.Flag{
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passphraseFlag,
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jsonFlag,
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cli.StringFlag{
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Name: "privatekey",
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Usage: "the file from where to read the private key to " +
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"generate a keyfile for",
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},
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},
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Action: func(ctx *cli.Context) error {
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// Check if keyfile path given and make sure it doesn't already exist.
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keyfilepath := ctx.Args().First()
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if keyfilepath == "" {
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keyfilepath = defaultKeyfileName
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}
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if _, err := os.Stat(keyfilepath); err == nil {
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utils.Fatalf("Keyfile already exists at %s.", keyfilepath)
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} else if !os.IsNotExist(err) {
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utils.Fatalf("Error checking if keyfile exists: %v", err)
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}
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var privateKey *ecdsa.PrivateKey
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// First check if a private key file is provided.
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privateKeyFile := ctx.String("privatekey")
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if privateKeyFile != "" {
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privateKeyBytes, err := ioutil.ReadFile(privateKeyFile)
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if err != nil {
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utils.Fatalf("Failed to read the private key file '%s': %v",
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privateKeyFile, err)
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}
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pk, err := crypto.HexToECDSA(string(privateKeyBytes))
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if err != nil {
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utils.Fatalf(
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"Could not construct ECDSA private key from file content: %v",
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err)
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}
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privateKey = pk
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}
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// If not loaded, generate random.
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if privateKey == nil {
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pk, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader)
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if err != nil {
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utils.Fatalf("Failed to generate random private key: %v", err)
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}
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privateKey = pk
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}
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// Create the keyfile object with a random UUID.
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id := uuid.NewRandom()
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key := &keystore.Key{
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Id: id,
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Address: crypto.PubkeyToAddress(privateKey.PublicKey),
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PrivateKey: privateKey,
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}
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// Encrypt key with passphrase.
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passphrase := getPassPhrase(ctx, true)
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keyjson, err := keystore.EncryptKey(key, passphrase,
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keystore.StandardScryptN, keystore.StandardScryptP)
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if err != nil {
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utils.Fatalf("Error encrypting key: %v", err)
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}
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// Store the file to disk.
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if err := os.MkdirAll(filepath.Dir(keyfilepath), 0700); err != nil {
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utils.Fatalf("Could not create directory %s", filepath.Dir(keyfilepath))
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}
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if err := ioutil.WriteFile(keyfilepath, keyjson, 0600); err != nil {
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utils.Fatalf("Failed to write keyfile to %s: %v", keyfilepath, err)
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}
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// Output some information.
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out := outputGenerate{
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Address: key.Address.Hex(),
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}
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if ctx.Bool(jsonFlag.Name) {
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mustPrintJSON(out)
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} else {
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fmt.Println("Address: ", out.Address)
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}
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return nil
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},
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}
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