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package encoding
import (
"fmt"
"github.com/tendermint/tendermint/crypto"
"github.com/tendermint/tendermint/crypto/ed25519"
"github.com/tendermint/tendermint/crypto/secp256k1"
"github.com/tendermint/tendermint/crypto/sr25519"
"github.com/tendermint/tendermint/libs/json"
cryptoproto "github.com/tendermint/tendermint/proto/tendermint/crypto"
)
func init() {
json.RegisterType((*cryptoproto.PublicKey)(nil), "tendermint.crypto.PublicKey")
json.RegisterType((*cryptoproto.PublicKey_Ed25519)(nil), "tendermint.crypto.PublicKey_Ed25519")
json.RegisterType((*cryptoproto.PublicKey_Secp256K1)(nil), "tendermint.crypto.PublicKey_Secp256K1")
}
// PubKeyToProto takes crypto.PubKey and transforms it to a protobuf Pubkey
func PubKeyToProto(k crypto.PubKey) (cryptoproto.PublicKey, error) {
var kp cryptoproto.PublicKey
switch k := k.(type) {
case ed25519.PubKey:
kp = cryptoproto.PublicKey{
Sum: &cryptoproto.PublicKey_Ed25519{
Ed25519: k,
},
}
case secp256k1.PubKey:
kp = cryptoproto.PublicKey{
Sum: &cryptoproto.PublicKey_Secp256K1{
Secp256K1: k,
},
}
case sr25519.PubKey:
kp = cryptoproto.PublicKey{
Sum: &cryptoproto.PublicKey_Sr25519{
Sr25519: k,
},
}
default:
return kp, fmt.Errorf("toproto: key type %v is not supported", k)
}
return kp, nil
}
// PubKeyFromProto takes a protobuf Pubkey and transforms it to a crypto.Pubkey
func PubKeyFromProto(k cryptoproto.PublicKey) (crypto.PubKey, error) {
switch k := k.Sum.(type) {
case *cryptoproto.PublicKey_Ed25519:
if len(k.Ed25519) != ed25519.PubKeySize {
return nil, fmt.Errorf("invalid size for PubKeyEd25519. Got %d, expected %d",
len(k.Ed25519), ed25519.PubKeySize)
}
pk := make(ed25519.PubKey, ed25519.PubKeySize)
copy(pk, k.Ed25519)
return pk, nil
case *cryptoproto.PublicKey_Secp256K1:
if len(k.Secp256K1) != secp256k1.PubKeySize {
return nil, fmt.Errorf("invalid size for PubKeySecp256k1. Got %d, expected %d",
len(k.Secp256K1), secp256k1.PubKeySize)
}
pk := make(secp256k1.PubKey, secp256k1.PubKeySize)
copy(pk, k.Secp256K1)
return pk, nil
case *cryptoproto.PublicKey_Sr25519:
if len(k.Sr25519) != sr25519.PubKeySize {
return nil, fmt.Errorf("invalid size for PubKeySr25519. Got %d, expected %d",
len(k.Sr25519), sr25519.PubKeySize)
}
pk := make(sr25519.PubKey, sr25519.PubKeySize)
copy(pk, k.Sr25519)
return pk, nil
default:
return nil, fmt.Errorf("fromproto: key type %v is not supported", k)
}
}