111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
/*
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This file is part of go-ethereum
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go-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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go-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @authors
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* Gustav Simonsson <gustav.simonsson@gmail.com>
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* @date 2015
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*
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*/
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package crypto
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/elliptic"
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"encoding/json"
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"io"
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"code.google.com/p/go-uuid/uuid"
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)
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type Key struct {
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Id uuid.UUID // Version 4 "random" for unique id not derived from key data
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// to simplify lookups we also store the address
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Address []byte
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// we only store privkey as pubkey/address can be derived from it
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// privkey in this struct is always in plaintext
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PrivateKey *ecdsa.PrivateKey
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}
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type plainKeyJSON struct {
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Id []byte
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Address []byte
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PrivateKey []byte
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}
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type cipherJSON struct {
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Salt []byte
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IV []byte
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CipherText []byte
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}
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type encryptedKeyJSON struct {
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Id []byte
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Address []byte
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Crypto cipherJSON
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}
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func (k *Key) MarshalJSON() (j []byte, err error) {
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jStruct := plainKeyJSON{
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k.Id,
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k.Address,
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FromECDSA(k.PrivateKey),
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}
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j, err = json.Marshal(jStruct)
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return j, err
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}
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func (k *Key) UnmarshalJSON(j []byte) (err error) {
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keyJSON := new(plainKeyJSON)
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err = json.Unmarshal(j, &keyJSON)
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if err != nil {
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return err
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}
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u := new(uuid.UUID)
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*u = keyJSON.Id
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k.Id = *u
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k.Address = keyJSON.Address
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k.PrivateKey = ToECDSA(keyJSON.PrivateKey)
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return err
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}
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func NewKey(rand io.Reader) *Key {
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randBytes := make([]byte, 32)
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_, err := rand.Read(randBytes)
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if err != nil {
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panic("key generation: could not read from random source: " + err.Error())
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}
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reader := bytes.NewReader(randBytes)
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_, x, y, err := elliptic.GenerateKey(S256(), reader)
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if err != nil {
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panic("key generation: elliptic.GenerateKey failed: " + err.Error())
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}
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privateKeyMarshalled := elliptic.Marshal(S256(), x, y)
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privateKeyECDSA := ToECDSA(privateKeyMarshalled)
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id := uuid.NewRandom()
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key := &Key{
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Id: id,
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Address: PubkeyToAddress(privateKeyECDSA.PublicKey),
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PrivateKey: privateKeyECDSA,
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}
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return key
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}
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