/
signer.go
92 lines (72 loc) · 2.05 KB
/
signer.go
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package keychain
import (
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcd/btcec/v2/ecdsa"
"github.com/btcsuite/btcd/chaincfg/chainhash"
)
func NewPubKeyMessageSigner(pubKey *btcec.PublicKey, keyLoc KeyLocator,
signer MessageSignerRing) *PubKeyMessageSigner {
return &PubKeyMessageSigner{
pubKey: pubKey,
keyLoc: keyLoc,
digestSigner: signer,
}
}
type PubKeyMessageSigner struct {
pubKey *btcec.PublicKey
keyLoc KeyLocator
digestSigner MessageSignerRing
}
func (p *PubKeyMessageSigner) PubKey() *btcec.PublicKey {
return p.pubKey
}
func (p *PubKeyMessageSigner) KeyLocator() KeyLocator {
return p.keyLoc
}
func (p *PubKeyMessageSigner) SignMessage(message []byte,
doubleHash bool) (*ecdsa.Signature, error) {
return p.digestSigner.SignMessage(p.keyLoc, message, doubleHash)
}
func (p *PubKeyMessageSigner) SignMessageCompact(msg []byte,
doubleHash bool) ([]byte, error) {
return p.digestSigner.SignMessageCompact(p.keyLoc, msg, doubleHash)
}
func NewPrivKeyMessageSigner(privKey *btcec.PrivateKey,
keyLoc KeyLocator) *PrivKeyMessageSigner {
return &PrivKeyMessageSigner{
privKey: privKey,
keyLoc: keyLoc,
}
}
type PrivKeyMessageSigner struct {
keyLoc KeyLocator
privKey *btcec.PrivateKey
}
func (p *PrivKeyMessageSigner) PubKey() *btcec.PublicKey {
return p.privKey.PubKey()
}
func (p *PrivKeyMessageSigner) KeyLocator() KeyLocator {
return p.keyLoc
}
func (p *PrivKeyMessageSigner) SignMessage(msg []byte,
doubleHash bool) (*ecdsa.Signature, error) {
var digest []byte
if doubleHash {
digest = chainhash.DoubleHashB(msg)
} else {
digest = chainhash.HashB(msg)
}
return ecdsa.Sign(p.privKey, digest), nil
}
func (p *PrivKeyMessageSigner) SignMessageCompact(msg []byte,
doubleHash bool) ([]byte, error) {
var digest []byte
if doubleHash {
digest = chainhash.DoubleHashB(msg)
} else {
digest = chainhash.HashB(msg)
}
return ecdsa.SignCompact(p.privKey, digest, true)
}
var _ SingleKeyMessageSigner = (*PubKeyMessageSigner)(nil)
var _ SingleKeyMessageSigner = (*PrivKeyMessageSigner)(nil)