-
Notifications
You must be signed in to change notification settings - Fork 0
/
key.go
125 lines (102 loc) · 2.72 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
package wallet
import (
"crypto/ecdsa"
"crypto/ed25519"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"github.com/anoideaopen/robot/hlf/sdkwrapper/service"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/core"
)
// Key is a core.Key wrapper for *ecdsa.PublicKey
type Key struct {
PrivKey ed25519.PrivateKey
PubKey ed25519.PublicKey
}
func NewKey(private string) (*Key, error) {
if private == "" {
pKey, sKey, err := service.GeneratePrivateAndPublicKey()
if err != nil {
return nil, err
}
return &Key{sKey, pKey}, nil
}
privateKey, publicKey, err := service.EncodedPrivKeyToEd25519(private)
if err != nil {
return nil, err
}
return &Key{privateKey, publicKey}, nil
}
// Bytes converts this key to its byte representation.
func (k *Key) Bytes() (raw []byte, err error) {
raw, err = x509.MarshalPKIXPublicKey(k.PubKey)
if err != nil {
return nil, fmt.Errorf("Failed marshalling key [%s]", err)
}
return
}
// SKI returns the subject key identifier of this key.
func (k *Key) SKI() (ski []byte) {
if k.PubKey == nil {
return nil
}
hash := sha256.New()
hash.Write(k.PubKey)
return hash.Sum(nil)
}
// Symmetric returns true if this key is a symmetric key, false otherwise.
func (k *Key) Symmetric() bool {
return false
}
// Private returns true if this key is a private key, false otherwise.
func (k *Key) Private() bool {
return k.PrivKey != nil
}
// PublicKey returns the corresponding public key part of an asymmetric public/private key pair.
func (k *Key) PublicKey() (core.Key, error) {
return k, nil
}
func PEMToPrivateKey(raw []byte, pwd []byte) (interface{}, error) {
block, _ := pem.Decode(raw)
if block == nil {
return nil, fmt.Errorf("failed decoding PEM. Block must be different from nil [% x]", raw)
}
if x509.IsEncryptedPEMBlock(block) {
if len(pwd) == 0 {
return nil, errors.New("encrypted Key. Need a password")
}
decrypted, err := x509.DecryptPEMBlock(block, pwd)
if err != nil {
return nil, fmt.Errorf("failed PEM decryption: [%s]", err)
}
key, err := derToPrivateKey(decrypted)
if err != nil {
return nil, err
}
return key, err
}
cert, err := derToPrivateKey(block.Bytes)
if err != nil {
return nil, err
}
return cert, err
}
func derToPrivateKey(der []byte) (key interface{}, err error) {
if key, err = x509.ParsePKCS1PrivateKey(der); err == nil {
return key, nil
}
if key, err = x509.ParsePKCS8PrivateKey(der); err == nil {
switch key.(type) {
case *ecdsa.PrivateKey:
return
default:
return nil, errors.New("found unknown private key type in PKCS#8 wrapping")
}
}
if key, err = x509.ParseECPrivateKey(der); err == nil {
return
}
return nil, errors.New("invalid key type. The DER must contain an ecdsa.PrivateKey")
}