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package account
import (
"errors"
"github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/tendermint/ed25519"
"github.com/tendermint/tendermint/binary"
. "github.com/tendermint/tendermint/common"
)
// PubKey is part of Account and Validator.
type PubKey interface {
IsNil() bool
Address() []byte
VerifyBytes(msg []byte, sig Signature) bool
}
// Types of PubKey implementations
const (
PubKeyTypeEd25519 = byte(0x01)
)
// for binary.readReflect
var _ = binary.RegisterInterface(
struct{ PubKey }{},
binary.ConcreteType{PubKeyEd25519{}, PubKeyTypeEd25519},
)
//-------------------------------------
// Implements PubKey
type PubKeyEd25519 []byte
func (pubKey PubKeyEd25519) IsNil() bool { return false }
// TODO: Or should this just be BinaryRipemd160(key)? (The difference is the TypeByte.)
func (pubKey PubKeyEd25519) Address() []byte { return binary.BinaryRipemd160(pubKey) }
func (pubKey PubKeyEd25519) VerifyBytes(msg []byte, sig_ Signature) bool {
sig, ok := sig_.(SignatureEd25519)
if !ok {
panic("PubKeyEd25519 expects an SignatureEd25519 signature")
}
pubKeyBytes := new([32]byte)
copy(pubKeyBytes[:], pubKey)
sigBytes := new([64]byte)
copy(sigBytes[:], sig)
return ed25519.Verify(pubKeyBytes, msg, sigBytes)
}
func (pubKey PubKeyEd25519) ValidateBasic() error {
if len(pubKey) != ed25519.PublicKeySize {
return errors.New("Invalid PubKeyEd25519 key size")
}
return nil
}
func (pubKey PubKeyEd25519) String() string {
return Fmt("PubKeyEd25519{%X}", []byte(pubKey))
}