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tendermint.go
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tendermint.go
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package crypto
import (
"fmt"
"github.com/btcsuite/btcd/btcec"
tmCrypto "github.com/tendermint/tendermint/crypto"
tmEd25519 "github.com/tendermint/tendermint/crypto/ed25519"
tmSecp256k1 "github.com/tendermint/tendermint/crypto/secp256k1"
)
func PublicKeyFromTendermintPubKey(pubKey tmCrypto.PubKey) (*PublicKey, error) {
switch pk := pubKey.(type) {
case tmEd25519.PubKey:
return PublicKeyFromBytes(pk[:], CurveTypeEd25519)
case tmSecp256k1.PubKey:
return PublicKeyFromBytes(pk[:], CurveTypeSecp256k1)
default:
return nil, fmt.Errorf("unrecognised tendermint public key type: %v", pk)
}
}
// PublicKey extensions
func (p PublicKey) TendermintPubKey() tmCrypto.PubKey {
switch p.CurveType {
case CurveTypeEd25519:
return tmEd25519.PubKey(p.PublicKey)
case CurveTypeSecp256k1:
return tmSecp256k1.PubKey(p.PublicKey)
default:
return nil
}
}
func (p PublicKey) TendermintAddress() tmCrypto.Address {
switch p.CurveType {
case CurveTypeEd25519:
return tmCrypto.Address(p.GetAddress().Bytes())
case CurveTypeSecp256k1:
// Tendermint represents addresses like Bitcoin
return tmCrypto.Address(RIPEMD160(SHA256(p.PublicKey[:])))
default:
panic(fmt.Sprintf("unknown CurveType %d", p.CurveType))
}
}
// Signature extensions
func (sig Signature) TendermintSignature() []byte {
switch sig.CurveType {
case CurveTypeSecp256k1:
sig, err := btcec.ParseDERSignature(sig.GetSignature(), btcec.S256())
if err != nil {
return nil
}
// https://github.com/tendermint/tendermint/blob/master/crypto/secp256k1/secp256k1_nocgo.go#L62
r := sig.R.Bytes()
s := sig.S.Bytes()
data := make([]byte, 64)
copy(data[32-len(r):32], r)
copy(data[64-len(s):64], s)
return data
}
return sig.Signature
}