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Merge pull request #359 from fjl/p2p-identity 

Persistent Node Key
This commit is contained in:
Jeffrey Wilcke 2015-02-22 13:27:53 +01:00
parent 8620dc05de e968928613
commit 59a86d3171
1 changed files with 30 additions and 6 deletions
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36
eth/backend.go
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@ -3,6 +3,8 @@ package eth
import (
"crypto/ecdsa"
"fmt"
"io/ioutil"
"path"
"strings"
"github.com/ethereum/go-ethereum/core"
@ -25,7 +27,10 @@ var (
jsonlogger = ethlogger.NewJsonLogger()
defaultBootNodes = []*discover.Node{
// ETH/DEV cmd/bootnode
discover.MustParseNode("enode://6cdd090303f394a1cac34ecc9f7cda18127eafa2a3a06de39f6d920b0e583e062a7362097c7c65ee490a758b442acd5c80c6fce4b148c6a391e946b45131365b@54.169.166.226:30303"),
// ETH/DEV cpp-ethereum (poc-8.ethdev.com)
discover.MustParseNode("enode://4a44599974518ea5b0f14c31c4463692ac0329cb84851f3435e6d1b18ee4eae4aa495f846a0fa1219bd58035671881d44423876e57db2abd57254d0197da0ebe@5.1.83.226:30303"),
}
)
@ -77,6 +82,27 @@ func (cfg *Config) parseBootNodes() []*discover.Node {
return ns
}
func (cfg *Config) nodeKey() (*ecdsa.PrivateKey, error) {
// use explicit key from command line args if set
if cfg.NodeKey != nil {
return cfg.NodeKey, nil
}
// use persistent key if present
keyfile := path.Join(cfg.DataDir, "nodekey")
key, err := crypto.LoadECDSA(keyfile)
if err == nil {
return key, nil
}
// no persistent key, generate and store a new one
if key, err = crypto.GenerateKey(); err != nil {
return nil, fmt.Errorf("could not generate server key: %v", err)
}
if err := ioutil.WriteFile(keyfile, crypto.FromECDSA(key), 0600); err != nil {
logger.Errorln("could not persist nodekey: ", err)
}
return key, nil
}
type Ethereum struct {
// Channel for shutting down the ethereum
shutdownChan chan bool
@ -161,18 +187,16 @@ func New(config *Config) (*Ethereum, error) {
insertChain := eth.chainManager.InsertChain
eth.blockPool = NewBlockPool(hasBlock, insertChain, ezp.Verify)
netprv, err := config.nodeKey()
if err != nil {
return nil, err
}
ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool)
protocols := []p2p.Protocol{ethProto}
if config.Shh {
protocols = append(protocols, eth.whisper.Protocol())
}
netprv := config.NodeKey
if netprv == nil {
if netprv, err = crypto.GenerateKey(); err != nil {
return nil, fmt.Errorf("could not generate server key: %v", err)
}
}
eth.net = &p2p.Server{
PrivateKey: netprv,
Name: config.Name,