forked from cuijinfeng68/L0
/
key.go
188 lines (164 loc) · 4.69 KB
/
key.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
// Copyright (C) 2017, Beijing Bochen Technology Co.,Ltd. All rights reserved.
//
// This file is part of L0
//
// The L0 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The L0 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 General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package keystore
import (
"crypto/ecdsa"
"encoding/hex"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"time"
"github.com/bocheninc/L0/components/crypto"
"github.com/bocheninc/L0/core/accounts"
"github.com/pborman/uuid"
)
type encryptedKeyJSON struct {
Address string `json:"address"`
Crypto cryptoJSON `json:"crypto"`
Id string `json:"id"`
}
type cryptoJSON struct {
Cipher string `json:"cipher"`
CipherText string `json:"ciphertext"`
CipherParams cipherparamsJSON `json:"cipherparams"`
KDF string `json:"kdf"`
KDFParams map[string]interface{} `json:"kdfparams"`
MAC string `json:"mac"`
}
type plainKeyJSON struct {
Address string `json:"address"`
PrivateKey string `json:"privatekey"`
Id string `json:"id"`
}
type Key struct {
Id uuid.UUID
Address accounts.Address
PrivateKey *crypto.PrivateKey
}
type keyStore interface {
GetKey(addr accounts.Address, filename string, auth string) (*Key, error)
StoreKey(filename string, k *Key, auth string) error
JoinPath(filename string) string
}
type cipherparamsJSON struct {
IV string `json:"iv"`
}
type scryptParamsJSON struct {
N int `json:"n"`
R int `json:"r"`
P int `json:"p"`
DkLen int `json:"dklen"`
Salt string `json:"salt"`
}
// Marshal key to json bytes
func (k *Key) MarshalJSON() (j []byte, err error) {
jStruct := plainKeyJSON{
hex.EncodeToString(k.Address[:]),
hex.EncodeToString(k.PrivateKey.SecretBytes()),
k.Id.String(),
}
j, err = json.Marshal(jStruct)
return j, err
}
// UnmarshalJSON restore key from json
func (k *Key) UnmarshalJSON(j []byte) (err error) {
keyJSON := new(plainKeyJSON)
err = json.Unmarshal(j, &keyJSON)
if err != nil {
return err
}
u := new(uuid.UUID)
*u = uuid.Parse(keyJSON.Id)
k.Id = *u
addr, err := hex.DecodeString(keyJSON.Address)
if err != nil {
return err
}
privkey, err := hex.DecodeString(keyJSON.PrivateKey)
if err != nil {
return err
}
k.Address = accounts.NewAddress(addr)
k.PrivateKey = crypto.ToECDSA(privkey)
return nil
}
func newKeyFromECDSA(privateKeyECDSA *ecdsa.PrivateKey) *Key {
id := uuid.NewRandom()
return &Key{
Id: id,
Address: accounts.PublicKeyToAddress((crypto.PublicKey)(privateKeyECDSA.PublicKey)),
PrivateKey: (*crypto.PrivateKey)(privateKeyECDSA),
}
}
func storeNewKey(ks keyStore, rand io.Reader, auth string) (*Key, accounts.Account, error) {
key, err := newKey(rand)
if err != nil {
return nil, accounts.Account{}, err
}
a := accounts.Account{
PublicKey: key.PrivateKey.Public(),
URL: accounts.URL{Scheme: KeyStoreScheme, Path: ks.JoinPath(keyFileName(key.Address))},
Address: key.Address,
}
if err := ks.StoreKey(a.URL.Path, key, auth); err != nil {
crypto.ZeroKey((*crypto.PrivateKey)(key.PrivateKey))
return nil, a, err
}
return key, a, err
}
func newKey(rand io.Reader) (*Key, error) {
privateKeyECDSA, err := ecdsa.GenerateKey(crypto.S256(), rand)
if err != nil {
return nil, err
}
return newKeyFromECDSA(privateKeyECDSA), nil
}
func writeKeyFile(file string, content []byte) error {
const dirPerm = 0700
if err := os.MkdirAll(filepath.Dir(file), dirPerm); err != nil {
return err
}
f, err := ioutil.TempFile(filepath.Dir(file), "."+filepath.Base(file)+".tmp")
if err != nil {
return err
}
if _, err := f.Write(content); err != nil {
f.Close()
os.Remove(f.Name())
return err
}
f.Close()
return os.Rename(f.Name(), file)
}
func keyFileName(keyAddr accounts.Address) string {
ts := time.Now().UTC()
return fmt.Sprintf("UTC--%s--%s", toISO8601(ts), hex.EncodeToString(keyAddr[:]))
}
func toISO8601(t time.Time) string {
var tz string
name, offset := t.Zone()
if name == "UTC" {
tz = "Z"
} else {
tz = fmt.Sprintf("%03d00", offset/3600)
}
return fmt.Sprintf("%04d-%02d-%02dT%02d-%02d-%02d.%09d%s", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), tz)
}