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89 lines
2.0 KiB
89 lines
2.0 KiB
package account
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import (
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"errors"
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"reflect"
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"github.com/tendermint/go-ed25519"
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. "github.com/tendermint/tendermint/binary"
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. "github.com/tendermint/tendermint/common"
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)
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// PubKey is part of Account and Validator.
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type PubKey interface {
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Address() []byte
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VerifyBytes(msg []byte, sig Signature) bool
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}
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// Types of PubKey implementations
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const (
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PubKeyTypeNil = byte(0x00)
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PubKeyTypeUnknown = byte(0x01) // For pay-to-pubkey-hash txs.
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PubKeyTypeEd25519 = byte(0x02)
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)
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//-------------------------------------
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// for binary.readReflect
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func PubKeyDecoder(r Unreader, n *int64, err *error) interface{} {
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switch t := PeekByte(r, n, err); t {
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case PubKeyTypeNil:
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return PubKeyNil{}
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case PubKeyTypeEd25519:
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return ReadBinary(PubKeyEd25519{}, r, n, err)
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default:
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*err = Errorf("Unknown PubKey type %X", t)
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return nil
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}
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}
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var _ = RegisterType(&TypeInfo{
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Type: reflect.TypeOf((*PubKey)(nil)).Elem(),
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Decoder: PubKeyDecoder,
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})
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//-------------------------------------
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// Implements PubKey
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type PubKeyNil struct{}
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func (key PubKeyNil) TypeByte() byte { return PubKeyTypeNil }
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func (key PubKeyNil) Address() []byte {
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panic("PubKeyNil has no address")
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}
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func (key PubKeyNil) VerifyBytes(msg []byte, sig_ Signature) bool {
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panic("PubKeyNil cannot verify messages")
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}
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//-------------------------------------
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// Implements PubKey
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type PubKeyEd25519 struct {
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PubKey []byte
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}
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func (key PubKeyEd25519) TypeByte() byte { return PubKeyTypeEd25519 }
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func (key PubKeyEd25519) Address() []byte { return BinaryRipemd160(key.PubKey) }
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func (key PubKeyEd25519) ValidateBasic() error {
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if len(key.PubKey) != ed25519.PublicKeySize {
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return errors.New("Invalid PubKeyEd25519 key size")
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}
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return nil
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}
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func (key PubKeyEd25519) VerifyBytes(msg []byte, sig_ Signature) bool {
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sig, ok := sig_.(SignatureEd25519)
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if !ok {
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panic("PubKeyEd25519 expects an SignatureEd25519 signature")
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}
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v1 := &ed25519.Verify{
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Message: msg,
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PubKey: key.PubKey,
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Signature: []byte(sig.Bytes),
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}
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return ed25519.VerifyBatch([]*ed25519.Verify{v1})
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}
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