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.
220 lines
5.3 KiB
220 lines
5.3 KiB
package crypto
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/sha256"
|
|
|
|
secp256k1 "github.com/btcsuite/btcd/btcec"
|
|
"github.com/tendermint/ed25519"
|
|
"github.com/tendermint/ed25519/extra25519"
|
|
. "github.com/tendermint/go-common"
|
|
data "github.com/tendermint/go-data"
|
|
"github.com/tendermint/go-wire"
|
|
"golang.org/x/crypto/ripemd160"
|
|
)
|
|
|
|
func PubKeyFromBytes(pubKeyBytes []byte) (pubKey PubKey, err error) {
|
|
err = wire.ReadBinaryBytes(pubKeyBytes, &pubKey)
|
|
return
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
type PubKey struct {
|
|
PubKeyInner `json:"unwrap"`
|
|
}
|
|
|
|
// DO NOT USE THIS INTERFACE.
|
|
// You probably want to use PubKey
|
|
type PubKeyInner interface {
|
|
AssertIsPubKeyInner()
|
|
Address() []byte
|
|
Bytes() []byte
|
|
KeyString() string
|
|
VerifyBytes(msg []byte, sig Signature) bool
|
|
Equals(PubKey) bool
|
|
Wrap() PubKey
|
|
}
|
|
|
|
func (pk PubKey) MarshalJSON() ([]byte, error) {
|
|
return pubKeyMapper.ToJSON(pk.PubKeyInner)
|
|
}
|
|
|
|
func (pk *PubKey) UnmarshalJSON(data []byte) (err error) {
|
|
parsed, err := pubKeyMapper.FromJSON(data)
|
|
if err == nil && parsed != nil {
|
|
pk.PubKeyInner = parsed.(PubKeyInner)
|
|
}
|
|
return
|
|
}
|
|
|
|
// Unwrap recovers the concrete interface safely (regardless of levels of embeds)
|
|
func (pk PubKey) Unwrap() PubKeyInner {
|
|
pkI := pk.PubKeyInner
|
|
for wrap, ok := pkI.(PubKey); ok; wrap, ok = pkI.(PubKey) {
|
|
pkI = wrap.PubKeyInner
|
|
}
|
|
return pkI
|
|
}
|
|
|
|
func (p PubKey) Empty() bool {
|
|
return p.PubKeyInner == nil
|
|
}
|
|
|
|
var pubKeyMapper = data.NewMapper(PubKey{}).
|
|
RegisterImplementation(PubKeyEd25519{}, NameEd25519, TypeEd25519).
|
|
RegisterImplementation(PubKeySecp256k1{}, NameSecp256k1, TypeSecp256k1)
|
|
|
|
//-------------------------------------
|
|
|
|
// Implements PubKeyInner
|
|
type PubKeyEd25519 [32]byte
|
|
|
|
func (pubKey PubKeyEd25519) AssertIsPubKeyInner() {}
|
|
|
|
func (pubKey PubKeyEd25519) Address() []byte {
|
|
w, n, err := new(bytes.Buffer), new(int), new(error)
|
|
wire.WriteBinary(pubKey[:], w, n, err)
|
|
if *err != nil {
|
|
PanicCrisis(*err)
|
|
}
|
|
// append type byte
|
|
encodedPubkey := append([]byte{TypeEd25519}, w.Bytes()...)
|
|
hasher := ripemd160.New()
|
|
hasher.Write(encodedPubkey) // does not error
|
|
return hasher.Sum(nil)
|
|
}
|
|
|
|
func (pubKey PubKeyEd25519) Bytes() []byte {
|
|
return wire.BinaryBytes(PubKey{pubKey})
|
|
}
|
|
|
|
func (pubKey PubKeyEd25519) VerifyBytes(msg []byte, sig_ Signature) bool {
|
|
// make sure we use the same algorithm to sign
|
|
sig, ok := sig_.Unwrap().(SignatureEd25519)
|
|
if !ok {
|
|
return false
|
|
}
|
|
pubKeyBytes := [32]byte(pubKey)
|
|
sigBytes := [64]byte(sig)
|
|
return ed25519.Verify(&pubKeyBytes, msg, &sigBytes)
|
|
}
|
|
|
|
func (p PubKeyEd25519) MarshalJSON() ([]byte, error) {
|
|
return data.Encoder.Marshal(p[:])
|
|
}
|
|
|
|
func (p *PubKeyEd25519) UnmarshalJSON(enc []byte) error {
|
|
var ref []byte
|
|
err := data.Encoder.Unmarshal(&ref, enc)
|
|
copy(p[:], ref)
|
|
return err
|
|
}
|
|
|
|
// For use with golang/crypto/nacl/box
|
|
// If error, returns nil.
|
|
func (pubKey PubKeyEd25519) ToCurve25519() *[32]byte {
|
|
keyCurve25519, pubKeyBytes := new([32]byte), [32]byte(pubKey)
|
|
ok := extra25519.PublicKeyToCurve25519(keyCurve25519, &pubKeyBytes)
|
|
if !ok {
|
|
return nil
|
|
}
|
|
return keyCurve25519
|
|
}
|
|
|
|
func (pubKey PubKeyEd25519) String() string {
|
|
return Fmt("PubKeyEd25519{%X}", pubKey[:])
|
|
}
|
|
|
|
// Must return the full bytes in hex.
|
|
// Used for map keying, etc.
|
|
func (pubKey PubKeyEd25519) KeyString() string {
|
|
return Fmt("%X", pubKey[:])
|
|
}
|
|
|
|
func (pubKey PubKeyEd25519) Equals(other PubKey) bool {
|
|
if otherEd, ok := other.Unwrap().(PubKeyEd25519); ok {
|
|
return bytes.Equal(pubKey[:], otherEd[:])
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (pubKey PubKeyEd25519) Wrap() PubKey {
|
|
return PubKey{pubKey}
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
// Implements PubKey.
|
|
// Compressed pubkey (just the x-cord),
|
|
// prefixed with 0x02 or 0x03, depending on the y-cord.
|
|
type PubKeySecp256k1 [33]byte
|
|
|
|
func (pubKey PubKeySecp256k1) AssertIsPubKeyInner() {}
|
|
|
|
// Implements Bitcoin style addresses: RIPEMD160(SHA256(pubkey))
|
|
func (pubKey PubKeySecp256k1) Address() []byte {
|
|
hasherSHA256 := sha256.New()
|
|
hasherSHA256.Write(pubKey[:]) // does not error
|
|
sha := hasherSHA256.Sum(nil)
|
|
|
|
hasherRIPEMD160 := ripemd160.New()
|
|
hasherRIPEMD160.Write(sha) // does not error
|
|
return hasherRIPEMD160.Sum(nil)
|
|
}
|
|
|
|
func (pubKey PubKeySecp256k1) Bytes() []byte {
|
|
return wire.BinaryBytes(PubKey{pubKey})
|
|
}
|
|
|
|
func (pubKey PubKeySecp256k1) VerifyBytes(msg []byte, sig_ Signature) bool {
|
|
// and assert same algorithm to sign and verify
|
|
sig, ok := sig_.Unwrap().(SignatureSecp256k1)
|
|
if !ok {
|
|
return false
|
|
}
|
|
|
|
pub__, err := secp256k1.ParsePubKey(pubKey[:], secp256k1.S256())
|
|
if err != nil {
|
|
return false
|
|
}
|
|
sig__, err := secp256k1.ParseDERSignature(sig[:], secp256k1.S256())
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return sig__.Verify(Sha256(msg), pub__)
|
|
}
|
|
|
|
func (p PubKeySecp256k1) MarshalJSON() ([]byte, error) {
|
|
return data.Encoder.Marshal(p[:])
|
|
}
|
|
|
|
func (p *PubKeySecp256k1) UnmarshalJSON(enc []byte) error {
|
|
var ref []byte
|
|
err := data.Encoder.Unmarshal(&ref, enc)
|
|
copy(p[:], ref)
|
|
return err
|
|
}
|
|
|
|
func (pubKey PubKeySecp256k1) String() string {
|
|
return Fmt("PubKeySecp256k1{%X}", pubKey[:])
|
|
}
|
|
|
|
// Must return the full bytes in hex.
|
|
// Used for map keying, etc.
|
|
func (pubKey PubKeySecp256k1) KeyString() string {
|
|
return Fmt("%X", pubKey[:])
|
|
}
|
|
|
|
func (pubKey PubKeySecp256k1) Equals(other PubKey) bool {
|
|
if otherSecp, ok := other.Unwrap().(PubKeySecp256k1); ok {
|
|
return bytes.Equal(pubKey[:], otherSecp[:])
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (pubKey PubKeySecp256k1) Wrap() PubKey {
|
|
return PubKey{pubKey}
|
|
}
|