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package account
import (
"bytes"
"errors"
"github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/tendermint/ed25519"
"github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/tendermint/ed25519/extra25519"
"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) }
// TODO: Consider returning a reason for failure, or logging a runtime type mismatch.
func (pubKey PubKeyEd25519) VerifyBytes(msg []byte, sig_ Signature) bool {
sig, ok := sig_.(SignatureEd25519)
if !ok {
return false
}
pubKeyBytes := new([32]byte)
copy(pubKeyBytes[:], pubKey)
sigBytes := new([64]byte)
copy(sigBytes[:], sig)
return ed25519.Verify(pubKeyBytes, msg, sigBytes)
}
// For use with golang/crypto/nacl/box
// If error, returns nil.
func (pubKey PubKeyEd25519) ToCurve25519() *[32]byte {
keyEd25519, keyCurve25519 := new([32]byte), new([32]byte)
copy(keyEd25519[:], pubKey)
ok := extra25519.PublicKeyToCurve25519(keyCurve25519, keyEd25519)
if !ok {
return nil
}
return keyCurve25519
}
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))
}
// Must return the full bytes in hex.
// Used for map keying, etc.
func (pubKey PubKeyEd25519) KeyString() string {
return Fmt("%X", []byte(pubKey))
}
func (pubKey PubKeyEd25519) Equals(other PubKey) bool {
if _, ok := other.(PubKeyEd25519); ok {
return bytes.Equal(pubKey, other.(PubKeyEd25519))
} else {
return false
}
}