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86 lines
2.0 KiB
86 lines
2.0 KiB
package account
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import (
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"errors"
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"github.com/tendermint/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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TypeByte() byte
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IsNil() bool
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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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PubKeyTypeEd25519 = byte(0x01)
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)
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// for binary.readReflect
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var _ = binary.RegisterInterface(
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struct{ PubKey }{},
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binary.ConcreteType{PubKeyNil{}},
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binary.ConcreteType{PubKeyEd25519{}},
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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) IsNil() bool { return true }
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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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func (key PubKeyEd25519) ValidateBasic() error {
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if len(key) != 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 PubKeyNil) String() string {
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return "PubKeyNil{}"
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}
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//-------------------------------------
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// Implements PubKey
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type PubKeyEd25519 []byte
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func (pubKey PubKeyEd25519) TypeByte() byte { return PubKeyTypeEd25519 }
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func (pubKey PubKeyEd25519) IsNil() bool { return false }
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// TODO: Or should this just be BinaryRipemd160(key)? (The difference is the TypeByte.)
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func (pubKey PubKeyEd25519) Address() []byte { return binary.BinaryRipemd160(pubKey) }
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func (pubKey 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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pubKeyBytes := new([32]byte)
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copy(pubKeyBytes[:], pubKey)
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sigBytes := new([64]byte)
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copy(sigBytes[:], sig)
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return ed25519.Verify(pubKeyBytes, msg, sigBytes)
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}
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func (pubKey PubKeyEd25519) String() string {
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return Fmt("PubKeyEd25519{%X}", pubKey)
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}
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