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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 (
"code.google.com/p/go-uuid/uuid"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/user"
"path"
)
// TODO: rename to KeyStore when replacing existing KeyStore
type KeyStore2 interface {
GenerateNewKey(string) (*Key, error) // create and store new key, optionally using auth string
GetKey(*uuid.UUID, string) (*Key, error) // key from id and auth string
StoreKey(*Key, string) error // store key optionally using auth string
DeleteKey(*uuid.UUID, string) error // delete key by id and auth string
}
type KeyStorePlaintext struct {
keysDirPath string
}
// TODO: copied from cmd/ethereum/flags.go
func DefaultDataDir() string {
usr, _ := user.Current()
return path.Join(usr.HomeDir, ".ethereum")
}
func (ks KeyStorePlaintext) GenerateNewKey(auth string) (key *Key, err error) {
key, err = GenerateNewKeyDefault(ks, auth)
return
}
func GenerateNewKeyDefault(ks KeyStore2, auth string) (key *Key, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("GenerateNewKey error: %v", r)
}
}()
key = NewKey()
err = ks.StoreKey(key, auth)
return
}
func (ks KeyStorePlaintext) GetKey(keyId *uuid.UUID, auth string) (key *Key, err error) {
fileContent, err := GetKeyFile(ks.keysDirPath, keyId)
if err != nil {
return
}
key = new(Key)
err = json.Unmarshal(fileContent, key)
return
}
func (ks KeyStorePlaintext) StoreKey(key *Key, auth string) (err error) {
keyJSON, err := json.Marshal(key)
if err != nil {
return
}
err = WriteKeyFile(key.Id.String(), ks.keysDirPath, keyJSON)
return
}
func (ks KeyStorePlaintext) DeleteKey(keyId *uuid.UUID, auth string) (err error) {
keyDirPath := path.Join(ks.keysDirPath, keyId.String())
err = os.RemoveAll(keyDirPath)
return
}
func GetKeyFile(keysDirPath string, keyId *uuid.UUID) (fileContent []byte, err error) {
idString := keyId.String()
keyDirPath := path.Join(keysDirPath, idString)
keyFilePath := path.Join(keyDirPath, idString)
fileContent, err = ioutil.ReadFile(keyFilePath)
return
}
func WriteKeyFile(idString string, keysDirPath string, content []byte) (err error) {
keyDirPath := path.Join(keysDirPath, idString)
keyFilePath := path.Join(keyDirPath, idString)
err = os.MkdirAll(keyDirPath, 0700) // read, write and dir search for user
if err != nil {
return
}
err = ioutil.WriteFile(keyFilePath, content, 0600) // read, write for user
return
}
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