115 lines
3.0 KiB
Go
115 lines
3.0 KiB
Go
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// Copyright 2017 AMIS Technologies
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package utils
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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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"log"
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"os"
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"path/filepath"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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uuid "github.com/satori/go.uuid"
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)
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const (
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defaultLocalDir = "/tmp/gdata"
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clientIdentifier = "geth"
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nodekeyFileName = "nodekey"
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)
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func GenerateRandomDir() (string, error) {
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err := os.MkdirAll(filepath.Join(defaultLocalDir), 0700)
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if err != nil {
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log.Fatal(err)
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}
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instanceDir := filepath.Join(defaultLocalDir, fmt.Sprintf("%s-%s", clientIdentifier, uuid.NewV4().String()))
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if err := os.MkdirAll(instanceDir, 0700); err != nil {
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log.Println(fmt.Sprintf("Failed to create instance dir: %v", err))
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return "", err
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}
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return instanceDir, nil
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}
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func GenerateKeys(num int) (keys []*ecdsa.PrivateKey, nodekeys []string, addrs []common.Address) {
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for i := 0; i < num; i++ {
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nodekey := RandomHex()
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nodekeys = append(nodekeys, nodekey)
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key, err := crypto.HexToECDSA(nodekey)
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if err != nil {
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log.Fatalf("couldn't generate key: " + err.Error())
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}
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keys = append(keys, key)
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addr := crypto.PubkeyToAddress(key.PublicKey)
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addrs = append(addrs, addr)
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}
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return keys, nodekeys, addrs
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}
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// func GenerateKeys(num int) (keys []*ecdsa.PrivateKey, addrs []common.Address) {
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// for i := 0; i < num; i++ {
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// key, err := crypto.GenerateKey()
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// if err != nil {
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// log.Fatalf("couldn't generate key: " + err.Error())
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// }
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// keys = append(keys, key)
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// addr := crypto.PubkeyToAddress(key.PublicKey)
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// addrs = append(addrs, addr)
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// }
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// return keys, addrs
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// }
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func SaveNodeKey(key *ecdsa.PrivateKey, dataDir string) error {
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keyDir := filepath.Join(dataDir, clientIdentifier)
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if err := os.MkdirAll(keyDir, 0700); err != nil {
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log.Println(fmt.Sprintf("Failed to create key dir: %v", err))
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return err
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}
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keyfile := filepath.Join(keyDir, nodekeyFileName)
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if err := crypto.SaveECDSA(keyfile, key); err != nil {
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log.Println(fmt.Sprintf("Failed to persist node key: %v", err))
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return err
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}
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return nil
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}
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func RandomHex() string {
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b, _ := RandomBytes(32)
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return common.BytesToHash(b).Hex()
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}
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func RandomBytes(len int) ([]byte, error) {
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b := make([]byte, len)
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_, err := rand.Read(b)
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if err != nil {
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log.Fatalln(err)
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}
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return b, nil
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}
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