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87 lines
2.2 KiB
87 lines
2.2 KiB
package account
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import (
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"bytes"
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"errors"
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"github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/tendermint/ed25519"
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"github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/tendermint/ed25519/extra25519"
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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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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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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{PubKeyEd25519{}, PubKeyTypeEd25519},
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)
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//-------------------------------------
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// Implements PubKey
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type PubKeyEd25519 [32]byte
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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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// TODO: Consider returning a reason for failure, or logging a runtime type mismatch.
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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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return false
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}
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pubKeyBytes := [32]byte(pubKey)
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sigBytes := [64]byte(sig)
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return ed25519.Verify(&pubKeyBytes, msg, &sigBytes)
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}
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// For use with golang/crypto/nacl/box
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// If error, returns nil.
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func (pubKey PubKeyEd25519) ToCurve25519() *[32]byte {
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keyCurve25519, pubKeyBytes := new([32]byte), [32]byte(pubKey)
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ok := extra25519.PublicKeyToCurve25519(keyCurve25519, &pubKeyBytes)
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if !ok {
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return nil
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}
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return keyCurve25519
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}
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// redundant: compiler does it for us
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func (pubKey PubKeyEd25519) ValidateBasic() error {
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if len(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 (pubKey PubKeyEd25519) String() string {
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return Fmt("PubKeyEd25519{%X}", pubKey[:])
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}
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// Must return the full bytes in hex.
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// Used for map keying, etc.
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func (pubKey PubKeyEd25519) KeyString() string {
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return Fmt("%X", pubKey[:])
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}
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func (pubKey PubKeyEd25519) Equals(other PubKey) bool {
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if otherEd, ok := other.(PubKeyEd25519); ok {
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return bytes.Equal(pubKey[:], otherEd[:])
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} else {
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return false
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}
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}
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