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/*
This file is part of go-ethereum
go-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
go-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @authors
* Gustav Simonsson <gustav.simonsson@gmail.com>
* @date 2015
*
*/
package crypto
import (
"encoding/hex"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"os/user"
"path"
)
// TODO: rename to KeyStore when replacing existing KeyStore
type KeyStore2 interface {
// create new key using io.Reader entropy source and optionally using auth string
GenerateNewKey(io.Reader, string) (*Key, error)
GetKey([]byte, string) (*Key, error) // key from addr and auth string
GetKeyAddresses() ([][]byte, error) // get all addresses
StoreKey(*Key, string) error // store key optionally using auth string
DeleteKey([]byte, string) error // delete key by addr and auth string
}
type keyStorePlain struct {
keysDirPath string
}
// TODO: copied from cmd/ethereum/flags.go
func DefaultDataDir() string {
usr, _ := user.Current()
return path.Join(usr.HomeDir, ".ethereum")
}
func NewKeyStorePlain(path string) KeyStore2 {
return &keyStorePlain{path}
}
func (ks keyStorePlain) GenerateNewKey(rand io.Reader, auth string) (key *Key, err error) {
return GenerateNewKeyDefault(ks, rand, auth)
}
func GenerateNewKeyDefault(ks KeyStore2, rand io.Reader, auth string) (key *Key, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("GenerateNewKey error: %v", r)
}
}()
key = NewKey(rand)
err = ks.StoreKey(key, auth)
return key, err
}
func (ks keyStorePlain) GetKey(keyAddr []byte, auth string) (key *Key, err error) {
fileContent, err := GetKeyFile(ks.keysDirPath, keyAddr)
if err != nil {
return nil, err
}
key = new(Key)
err = json.Unmarshal(fileContent, key)
return key, err
}
func (ks keyStorePlain) GetKeyAddresses() (addresses [][]byte, err error) {
return GetKeyAddresses(ks.keysDirPath)
}
func (ks keyStorePlain) StoreKey(key *Key, auth string) (err error) {
keyJSON, err := json.Marshal(key)
if err != nil {
return err
}
err = WriteKeyFile(key.Address, ks.keysDirPath, keyJSON)
return err
}
func (ks keyStorePlain) DeleteKey(keyAddr []byte, auth string) (err error) {
keyDirPath := path.Join(ks.keysDirPath, hex.EncodeToString(keyAddr))
err = os.RemoveAll(keyDirPath)
return err
}
func GetKeyFile(keysDirPath string, keyAddr []byte) (fileContent []byte, err error) {
fileName := hex.EncodeToString(keyAddr)
return ioutil.ReadFile(path.Join(keysDirPath, fileName, fileName))
}
func WriteKeyFile(addr []byte, keysDirPath string, content []byte) (err error) {
addrHex := hex.EncodeToString(addr)
keyDirPath := path.Join(keysDirPath, addrHex)
keyFilePath := path.Join(keyDirPath, addrHex)
err = os.MkdirAll(keyDirPath, 0700) // read, write and dir search for user
if err != nil {
return err
}
return ioutil.WriteFile(keyFilePath, content, 0600) // read, write for user
}
func GetKeyAddresses(keysDirPath string) (addresses [][]byte, err error) {
fileInfos, err := ioutil.ReadDir(keysDirPath)
if err != nil {
return nil, err
}
addresses = make([][]byte, len(fileInfos))
for i, fileInfo := range fileInfos {
addresses[i] = make([]byte, 40)
addresses[i] = []byte(fileInfo.Name())
}
return addresses, err
}
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