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package crypto
import (
"fmt"
"io/ioutil"
"os"
"path"
"strings"
"github.com/ethereum/go-ethereum/ethutil"
)
type KeyStore interface {
Load(string) (*KeyRing, error)
Save(string, *KeyRing) error
}
type DBKeyStore struct {
db ethutil.Database
}
const dbKeyPrefix = "KeyRing"
func (k *DBKeyStore) dbKey(session string) []byte {
return []byte(fmt.Sprintf("%s%s", dbKeyPrefix, session))
}
func (k *DBKeyStore) Save(session string, keyRing *KeyRing) error {
k.db.Put(k.dbKey(session), keyRing.RlpEncode())
return nil
}
func (k *DBKeyStore) Load(session string) (*KeyRing, error) {
data, err := k.db.Get(k.dbKey(session))
if err != nil {
return nil, nil
}
var keyRing *KeyRing
keyRing, err = NewKeyRingFromBytes(data)
if err != nil {
return nil, err
}
// if empty keyRing is found we return nil, no error
if keyRing.Len() == 0 {
return nil, nil
}
return keyRing, nil
}
type FileKeyStore struct {
basedir string
}
func (k *FileKeyStore) Save(session string, keyRing *KeyRing) error {
var content []byte
var err error
var privateKeys []string
var publicKeys []string
var mnemonics []string
var addresses []string
keyRing.Each(func(keyPair *KeyPair) {
privateKeys = append(privateKeys, ethutil.Bytes2Hex(keyPair.PrivateKey))
publicKeys = append(publicKeys, ethutil.Bytes2Hex(keyPair.PublicKey))
addresses = append(addresses, ethutil.Bytes2Hex(keyPair.Address()))
mnemonics = append(mnemonics, keyPair.Mnemonic())
})
basename := session
if session == "" {
basename = "default"
}
path := path.Join(k.basedir, basename)
content = []byte(strings.Join(privateKeys, "\n"))
err = ioutil.WriteFile(path+".prv", content, 0600)
if err != nil {
return err
}
content = []byte(strings.Join(publicKeys, "\n"))
err = ioutil.WriteFile(path+".pub", content, 0644)
if err != nil {
return err
}
content = []byte(strings.Join(addresses, "\n"))
err = ioutil.WriteFile(path+".addr", content, 0644)
if err != nil {
return err
}
content = []byte(strings.Join(mnemonics, "\n"))
err = ioutil.WriteFile(path+".mne", content, 0600)
if err != nil {
return err
}
return nil
}
func (k *FileKeyStore) Load(session string) (*KeyRing, error) {
basename := session
if session == "" {
basename = "default"
}
secfile := path.Join(k.basedir, basename+".prv")
_, err := os.Stat(secfile)
// if file is not found then we return nil, no error
if err != nil {
return nil, nil
}
return NewKeyRingFromFile(secfile)
}
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