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author | Gustav Simonsson <gustav.simonsson@gmail.com> | 2014-12-31 22:39:33 +0800 |
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committer | Gustav Simonsson <gustav.simonsson@gmail.com> | 2015-01-16 02:40:10 +0800 |
commit | 945798f913d5cabd79635f45045b680b02396bf9 (patch) | |
tree | b41751b7f2c1f48a5494090c69233736f772924b /crypto/key_store_plaintext_file.go | |
parent | bb55307a9d8fa73b0fbc0727f8b80925a87627b7 (diff) | |
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Add new key_store interface and two new key stores
* Add new generic key_store interface
* Add new plaintext key store storing unprotected keys on disk
* Add new encrypted key store storing encrypted keys on disk
* Add new entropy mixing function using OS and go runtime sources
Diffstat (limited to 'crypto/key_store_plaintext_file.go')
-rw-r--r-- | crypto/key_store_plaintext_file.go | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/crypto/key_store_plaintext_file.go b/crypto/key_store_plaintext_file.go new file mode 100644 index 000000000..7ca5e5679 --- /dev/null +++ b/crypto/key_store_plaintext_file.go @@ -0,0 +1,113 @@ +/* + 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 +} |