/
utils.go
62 lines (50 loc) · 1.22 KB
/
utils.go
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// Copyright (c) 2018 The VeChainThor developers
// Distributed under the GNU Lesser General Public License v3.0 software license, see the accompanying
// file LICENSE or <https://www.gnu.org/licenses/lgpl-3.0.html>
package main
import (
"crypto/ecdsa"
"os"
"os/user"
"path/filepath"
"github.com/ethereum/go-ethereum/crypto"
)
func loadOrGenerateKeyFile(keyFile string) (key *ecdsa.PrivateKey, err error) {
if !filepath.IsAbs(keyFile) {
if keyFile, err = filepath.Abs(keyFile); err != nil {
return nil, err
}
}
// try to load from file
if key, err = crypto.LoadECDSA(keyFile); err != nil {
if !os.IsNotExist(err) {
return nil, err
}
} else {
return key, nil
}
// no such file, generate new key and write in
key, err = crypto.GenerateKey()
if err != nil {
return nil, err
}
if err := crypto.SaveECDSA(keyFile, key); err != nil {
return nil, err
}
return key, nil
}
func defaultKeyFile() string {
return filepath.Join(mustHomeDir(), ".thor-disco.key")
}
func mustHomeDir() string {
// try to get HOME env
if home := os.Getenv("HOME"); home != "" {
return home
}
if user, err := user.Current(); err == nil {
if user.HomeDir != "" {
return user.HomeDir
}
}
return filepath.Base(os.Args[0])
}