You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
215 lines
5.8 KiB
215 lines
5.8 KiB
package crypto
|
|
|
|
import (
|
|
"crypto/subtle"
|
|
|
|
secp256k1 "github.com/btcsuite/btcd/btcec"
|
|
"github.com/tendermint/ed25519"
|
|
"github.com/tendermint/ed25519/extra25519"
|
|
"github.com/tendermint/go-wire"
|
|
data "github.com/tendermint/go-wire/data"
|
|
. "github.com/tendermint/tmlibs/common"
|
|
)
|
|
|
|
func PrivKeyFromBytes(privKeyBytes []byte) (privKey PrivKey, err error) {
|
|
err = wire.ReadBinaryBytes(privKeyBytes, &privKey)
|
|
if err == nil {
|
|
// add support for a ValidateKey method on PrivKeys
|
|
// to make sure they load correctly
|
|
val, ok := privKey.Unwrap().(validatable)
|
|
if ok {
|
|
err = val.ValidateKey()
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// validatable is an optional interface for keys that want to
|
|
// check integrity
|
|
type validatable interface {
|
|
ValidateKey() error
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
// DO NOT USE THIS INTERFACE.
|
|
// You probably want to use PrivKey
|
|
// +gen wrapper:"PrivKey,Impl[PrivKeyEd25519,PrivKeySecp256k1],ed25519,secp256k1"
|
|
type PrivKeyInner interface {
|
|
AssertIsPrivKeyInner()
|
|
Bytes() []byte
|
|
Sign(msg []byte) Signature
|
|
PubKey() PubKey
|
|
Equals(PrivKey) bool
|
|
Wrap() PrivKey
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
var _ PrivKeyInner = PrivKeyEd25519{}
|
|
|
|
// Implements PrivKey
|
|
type PrivKeyEd25519 [64]byte
|
|
|
|
func (privKey PrivKeyEd25519) AssertIsPrivKeyInner() {}
|
|
|
|
func (privKey PrivKeyEd25519) Bytes() []byte {
|
|
return wire.BinaryBytes(PrivKey{privKey})
|
|
}
|
|
|
|
func (privKey PrivKeyEd25519) Sign(msg []byte) Signature {
|
|
privKeyBytes := [64]byte(privKey)
|
|
signatureBytes := ed25519.Sign(&privKeyBytes, msg)
|
|
return SignatureEd25519(*signatureBytes).Wrap()
|
|
}
|
|
|
|
func (privKey PrivKeyEd25519) PubKey() PubKey {
|
|
privKeyBytes := [64]byte(privKey)
|
|
pubBytes := *ed25519.MakePublicKey(&privKeyBytes)
|
|
return PubKeyEd25519(pubBytes).Wrap()
|
|
}
|
|
|
|
// 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.Unwrap().(PrivKeyEd25519); ok {
|
|
return subtle.ConstantTimeCompare(privKey[:], otherEd[:]) == 1
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (p PrivKeyEd25519) MarshalJSON() ([]byte, error) {
|
|
return data.Encoder.Marshal(p[:])
|
|
}
|
|
|
|
func (p *PrivKeyEd25519) UnmarshalJSON(enc []byte) error {
|
|
var ref []byte
|
|
err := data.Encoder.Unmarshal(&ref, enc)
|
|
copy(p[:], ref)
|
|
return err
|
|
}
|
|
|
|
func (privKey PrivKeyEd25519) ToCurve25519() *[32]byte {
|
|
keyCurve25519 := new([32]byte)
|
|
privKeyBytes := [64]byte(privKey)
|
|
extra25519.PrivateKeyToCurve25519(keyCurve25519, &privKeyBytes)
|
|
return keyCurve25519
|
|
}
|
|
|
|
func (privKey PrivKeyEd25519) String() string {
|
|
return Fmt("PrivKeyEd25519{*****}")
|
|
}
|
|
|
|
// Deterministically generates new priv-key bytes from key.
|
|
func (privKey PrivKeyEd25519) Generate(index int) PrivKeyEd25519 {
|
|
newBytes := wire.BinarySha256(struct {
|
|
PrivKey [64]byte
|
|
Index int
|
|
}{privKey, index})
|
|
var newKey [64]byte
|
|
copy(newKey[:], newBytes)
|
|
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 _ PrivKeyInner = PrivKeySecp256k1{}
|
|
|
|
// Implements PrivKey
|
|
type PrivKeySecp256k1 [32]byte
|
|
|
|
func (privKey PrivKeySecp256k1) AssertIsPrivKeyInner() {}
|
|
|
|
func (privKey PrivKeySecp256k1) Bytes() []byte {
|
|
return wire.BinaryBytes(PrivKey{privKey})
|
|
}
|
|
|
|
func (privKey PrivKeySecp256k1) Sign(msg []byte) Signature {
|
|
priv__, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey[:])
|
|
sig__, err := priv__.Sign(Sha256(msg))
|
|
if err != nil {
|
|
PanicSanity(err)
|
|
}
|
|
return SignatureSecp256k1(sig__.Serialize()).Wrap()
|
|
}
|
|
|
|
func (privKey PrivKeySecp256k1) PubKey() PubKey {
|
|
_, pub__ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey[:])
|
|
var pub PubKeySecp256k1
|
|
copy(pub[:], pub__.SerializeCompressed())
|
|
return pub.Wrap()
|
|
}
|
|
|
|
// 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.Unwrap().(PrivKeySecp256k1); ok {
|
|
return subtle.ConstantTimeCompare(privKey[:], otherSecp[:]) == 1
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (p PrivKeySecp256k1) MarshalJSON() ([]byte, error) {
|
|
return data.Encoder.Marshal(p[:])
|
|
}
|
|
|
|
func (p *PrivKeySecp256k1) UnmarshalJSON(enc []byte) error {
|
|
var ref []byte
|
|
err := data.Encoder.Unmarshal(&ref, enc)
|
|
copy(p[:], ref)
|
|
return err
|
|
}
|
|
|
|
func (privKey PrivKeySecp256k1) String() string {
|
|
return Fmt("PrivKeySecp256k1{*****}")
|
|
}
|
|
|
|
/*
|
|
// Deterministically generates new priv-key bytes from key.
|
|
func (key PrivKeySecp256k1) Generate(index int) PrivKeySecp256k1 {
|
|
newBytes := wire.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)
|
|
}
|