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- package crypto
-
- import (
- "bytes"
-
- "github.com/tendermint/ed25519"
- "github.com/tendermint/ed25519/extra25519"
- . "github.com/tendermint/go-common"
- "github.com/tendermint/go-wire"
- "golang.org/x/crypto/ripemd160"
- )
-
- // PubKey is part of Account and Validator.
- type PubKey interface {
- Address() []byte
- KeyString() string
- VerifyBytes(msg []byte, sig Signature) bool
- }
-
- // Types of PubKey implementations
- const (
- PubKeyTypeEd25519 = byte(0x01)
- )
-
- // for wire.readReflect
- var _ = wire.RegisterInterface(
- struct{ PubKey }{},
- wire.ConcreteType{PubKeyEd25519{}, PubKeyTypeEd25519},
- )
-
- //-------------------------------------
-
- // Implements PubKey
- type PubKeyEd25519 [32]byte
-
- // TODO: Slicing the array gives us length prefixing but loses the type byte.
- // Revisit if we add more pubkey types.
- // For now, we artificially append the type byte in front to give us backwards
- // compatibility for when the pubkey wasn't fixed length array
- func (pubKey PubKeyEd25519) Address() []byte {
- w, n, err := new(bytes.Buffer), new(int), new(error)
- wire.WriteBinary(pubKey[:], w, n, err)
- if *err != nil {
- PanicCrisis(*err)
- }
- // append type byte
- encodedPubkey := append([]byte{1}, w.Bytes()...)
- hasher := ripemd160.New()
- hasher.Write(encodedPubkey) // does not error
- return hasher.Sum(nil)
- }
-
- // 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 := [32]byte(pubKey)
- sigBytes := [64]byte(sig)
- return ed25519.Verify(&pubKeyBytes, msg, &sigBytes)
- }
-
- // For use with golang/crypto/nacl/box
- // If error, returns nil.
- func (pubKey PubKeyEd25519) ToCurve25519() *[32]byte {
- keyCurve25519, pubKeyBytes := new([32]byte), [32]byte(pubKey)
- ok := extra25519.PublicKeyToCurve25519(keyCurve25519, &pubKeyBytes)
- if !ok {
- return nil
- }
- return keyCurve25519
- }
-
- func (pubKey PubKeyEd25519) String() string {
- return Fmt("PubKeyEd25519{%X}", pubKey[:])
- }
-
- // Must return the full bytes in hex.
- // Used for map keying, etc.
- func (pubKey PubKeyEd25519) KeyString() string {
- return Fmt("%X", pubKey[:])
- }
-
- func (pubKey PubKeyEd25519) Equals(other PubKey) bool {
- if otherEd, ok := other.(PubKeyEd25519); ok {
- return bytes.Equal(pubKey[:], otherEd[:])
- } else {
- return false
- }
- }
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