This repository has been archived by the owner on Jul 15, 2018. It is now read-only.
/
priv_key.go
164 lines (138 loc) · 4.45 KB
/
priv_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
package crypto
import (
"crypto/subtle"
secp256k1 "github.com/btcsuite/btcd/btcec"
"github.com/tendermint/ed25519"
"github.com/tendermint/ed25519/extra25519"
)
func PrivKeyFromBytes(privKeyBytes []byte) (privKey PrivKey, err error) {
err = cdc.UnmarshalBinaryBare(privKeyBytes, &privKey)
return
}
//----------------------------------------
type PrivKey interface {
Bytes() []byte
Sign(msg []byte) (Signature, error)
PubKey() PubKey
Equals(PrivKey) bool
}
//-------------------------------------
var _ PrivKey = PrivKeyEd25519{}
// Implements PrivKey
type PrivKeyEd25519 [64]byte
func (privKey PrivKeyEd25519) Bytes() []byte {
return cdc.MustMarshalBinaryBare(privKey)
}
func (privKey PrivKeyEd25519) Sign(msg []byte) (Signature, error) {
privKeyBytes := [64]byte(privKey)
signatureBytes := ed25519.Sign(&privKeyBytes, msg)
return SignatureEd25519(*signatureBytes), nil
}
func (privKey PrivKeyEd25519) PubKey() PubKey {
privKeyBytes := [64]byte(privKey)
pubBytes := *ed25519.MakePublicKey(&privKeyBytes)
return PubKeyEd25519(pubBytes)
}
// Equals - you probably don't need to use this.
// Runs in constant time based on length of the keys.
func (privKey PrivKeyEd25519) Equals(other PrivKey) bool {
if otherEd, ok := other.(PrivKeyEd25519); ok {
return subtle.ConstantTimeCompare(privKey[:], otherEd[:]) == 1
} else {
return false
}
}
func (privKey PrivKeyEd25519) ToCurve25519() *[32]byte {
keyCurve25519 := new([32]byte)
privKeyBytes := [64]byte(privKey)
extra25519.PrivateKeyToCurve25519(keyCurve25519, &privKeyBytes)
return keyCurve25519
}
// Deterministically generates new priv-key bytes from key.
func (privKey PrivKeyEd25519) Generate(index int) PrivKeyEd25519 {
bz, err := cdc.MarshalBinaryBare(struct {
PrivKey [64]byte
Index int
}{privKey, index})
if err != nil {
panic(err)
}
newBytes := Sha256(bz)
newKey := new([64]byte)
copy(newKey[:32], newBytes)
ed25519.MakePublicKey(newKey)
return PrivKeyEd25519(*newKey)
}
func GenPrivKeyEd25519() PrivKeyEd25519 {
privKeyBytes := new([64]byte)
copy(privKeyBytes[:32], CRandBytes(32))
ed25519.MakePublicKey(privKeyBytes)
return PrivKeyEd25519(*privKeyBytes)
}
// NOTE: secret should be the output of a KDF like bcrypt,
// if it's derived from user input.
func GenPrivKeyEd25519FromSecret(secret []byte) PrivKeyEd25519 {
privKey32 := Sha256(secret) // Not Ripemd160 because we want 32 bytes.
privKeyBytes := new([64]byte)
copy(privKeyBytes[:32], privKey32)
ed25519.MakePublicKey(privKeyBytes)
return PrivKeyEd25519(*privKeyBytes)
}
//-------------------------------------
var _ PrivKey = PrivKeySecp256k1{}
// Implements PrivKey
type PrivKeySecp256k1 [32]byte
func (privKey PrivKeySecp256k1) Bytes() []byte {
return cdc.MustMarshalBinaryBare(privKey)
}
func (privKey PrivKeySecp256k1) Sign(msg []byte) (Signature, error) {
priv__, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey[:])
sig__, err := priv__.Sign(Sha256(msg))
if err != nil {
return nil, err
}
return SignatureSecp256k1(sig__.Serialize()), nil
}
func (privKey PrivKeySecp256k1) PubKey() PubKey {
_, pub__ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey[:])
var pub PubKeySecp256k1
copy(pub[:], pub__.SerializeCompressed())
return pub
}
// Equals - you probably don't need to use this.
// Runs in constant time based on length of the keys.
func (privKey PrivKeySecp256k1) Equals(other PrivKey) bool {
if otherSecp, ok := other.(PrivKeySecp256k1); ok {
return subtle.ConstantTimeCompare(privKey[:], otherSecp[:]) == 1
} else {
return false
}
}
/*
// Deterministically generates new priv-key bytes from key.
func (key PrivKeySecp256k1) Generate(index int) PrivKeySecp256k1 {
newBytes := cdc.BinarySha256(struct {
PrivKey [64]byte
Index int
}{key, index})
var newKey [64]byte
copy(newKey[:], newBytes)
return PrivKeySecp256k1(newKey)
}
*/
func GenPrivKeySecp256k1() PrivKeySecp256k1 {
privKeyBytes := [32]byte{}
copy(privKeyBytes[:], CRandBytes(32))
priv, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKeyBytes[:])
copy(privKeyBytes[:], priv.Serialize())
return PrivKeySecp256k1(privKeyBytes)
}
// NOTE: secret should be the output of a KDF like bcrypt,
// if it's derived from user input.
func GenPrivKeySecp256k1FromSecret(secret []byte) PrivKeySecp256k1 {
privKey32 := Sha256(secret) // Not Ripemd160 because we want 32 bytes.
priv, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey32)
privKeyBytes := [32]byte{}
copy(privKeyBytes[:], priv.Serialize())
return PrivKeySecp256k1(privKeyBytes)
}